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DivestOS/Patches/LineageOS-17.1/android_packages_services_Telecomm/356360.patch

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Thomas Stuart <tjstuart@google.com>
Date: Mon, 21 Nov 2022 17:36:52 -0800
Subject: [PATCH] enforce stricter rules when registering phoneAccounts
- include disable accounts when looking up accounts for a package to
check if the limit is reached (10)
- put a new limit of 10 supported schemes
- put a new limit of 256 characters per scheme
- put a new limit of 256 characters per address
- ensure the Icon can write to memory w/o an exception
bug: 259064622
bug: 256819769
Test: cts + unit
Change-Id: I5eb2a127a44d5ec725d0ba39cb0ef478b12013de
Merged-In: I5eb2a127a44d5ec725d0ba39cb0ef478b12013de
(cherry picked from commit on googleplex-android-review.googlesource.com host: 56ef9e15506f71ae555a4535d5c0ac9bd3f587f1)
Merged-In: I5eb2a127a44d5ec725d0ba39cb0ef478b12013de
---
.../server/telecom/PhoneAccountRegistrar.java | 183 ++++++++++++++++--
.../server/telecom/TelecomServiceImpl.java | 4 +-
.../tests/PhoneAccountRegistrarTest.java | 101 ++++++++++
.../telecom/tests/TelecomServiceImplTest.java | 2 +-
4 files changed, 274 insertions(+), 16 deletions(-)
diff --git a/src/com/android/server/telecom/PhoneAccountRegistrar.java b/src/com/android/server/telecom/PhoneAccountRegistrar.java
index 13b176c25..219de7d03 100644
--- a/src/com/android/server/telecom/PhoneAccountRegistrar.java
+++ b/src/com/android/server/telecom/PhoneAccountRegistrar.java
@@ -29,6 +29,7 @@ import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.Icon;
import android.net.Uri;
+import android.os.Binder;
import android.os.Bundle;
import android.os.AsyncTask;
import android.os.PersistableBundle;
@@ -140,9 +141,14 @@ public class PhoneAccountRegistrar {
}
public static final String FILE_NAME = "phone-account-registrar-state.xml";
+ public static final String ICON_ERROR_MSG =
+ "Icon cannot be written to memory. Try compressing or downsizing";
@VisibleForTesting
public static final int EXPECTED_STATE_VERSION = 9;
public static final int MAX_PHONE_ACCOUNT_REGISTRATIONS = 10;
+ public static final int MAX_PHONE_ACCOUNT_EXTRAS_KEY_PAIR_LIMIT = 100;
+ public static final int MAX_PHONE_ACCOUNT_FIELD_CHAR_LIMIT = 256;
+ public static final int MAX_SCHEMES_PER_ACCOUNT = 10;
/** Keep in sync with the same in SipSettings.java */
private static final String SIP_SHARED_PREFERENCES = "SIP_PREFERENCES";
@@ -722,6 +728,15 @@ public class PhoneAccountRegistrar {
return getPhoneAccountHandles(0, null, packageName, false, userHandle);
}
+
+ /**
+ * includes disabled, includes crossUserAccess
+ */
+ public List<PhoneAccountHandle> getAllPhoneAccountHandlesForPackage(UserHandle userHandle,
+ String packageName) {
+ return getPhoneAccountHandles(0, null, packageName, true /* includeDisabled */, userHandle);
+ }
+
/**
* Determines if a {@link PhoneAccountHandle} is for a self-managed {@link ConnectionService}.
* @param handle The handle.
@@ -741,8 +756,11 @@ public class PhoneAccountRegistrar {
* Performs checks before calling addOrReplacePhoneAccount(PhoneAccount)
*
* @param account The {@code PhoneAccount} to add or replace.
- * @throws SecurityException if package does not have BIND_TELECOM_CONNECTION_SERVICE permission
+ * @throws SecurityException if package does not have BIND_TELECOM_CONNECTION_SERVICE
+ * permission
* @throws IllegalArgumentException if MAX_PHONE_ACCOUNT_REGISTRATIONS are reached
+ * @throws IllegalArgumentException if MAX_PHONE_ACCOUNT_FIELD_CHAR_LIMIT is reached
+ * @throws IllegalArgumentException if writing the Icon to memory will cause an Exception
*/
public void registerPhoneAccount(PhoneAccount account) {
// Enforce the requirement that a connection service for a phone account has the correct
@@ -754,21 +772,155 @@ public class PhoneAccountRegistrar {
throw new SecurityException("PhoneAccount connection service requires "
+ "BIND_TELECOM_CONNECTION_SERVICE permission.");
}
- //Enforce an upper bound on the number of PhoneAccount's a package can register.
- // Most apps should only require 1-2.
- if (getPhoneAccountsForPackage(
- account.getAccountHandle().getComponentName().getPackageName(),
- account.getAccountHandle().getUserHandle()).size()
+ enforceCharacterLimit(account);
+ enforceIconSizeLimit(account);
+ enforceMaxPhoneAccountLimit(account);
+ addOrReplacePhoneAccount(account);
+ }
+
+ /**
+ * Enforce an upper bound on the number of PhoneAccount's a package can register.
+ * Most apps should only require 1-2. * Include disabled accounts.
+ *
+ * @param account to enforce check on
+ * @throws IllegalArgumentException if MAX_PHONE_ACCOUNT_REGISTRATIONS are reached
+ */
+ private void enforceMaxPhoneAccountLimit(@NonNull PhoneAccount account) {
+ final PhoneAccountHandle accountHandle = account.getAccountHandle();
+ final UserHandle user = accountHandle.getUserHandle();
+ final ComponentName componentName = accountHandle.getComponentName();
+
+ if (getPhoneAccountHandles(0, null, componentName.getPackageName(),
+ true /* includeDisabled */, user).size()
>= MAX_PHONE_ACCOUNT_REGISTRATIONS) {
- Log.w(this, "Phone account %s reached max registration limit for package",
- account.getAccountHandle());
+ EventLog.writeEvent(0x534e4554, "259064622", Binder.getCallingUid(),
+ "enforceMaxPhoneAccountLimit");
throw new IllegalArgumentException(
"Error, cannot register phone account " + account.getAccountHandle()
+ " because the limit, " + MAX_PHONE_ACCOUNT_REGISTRATIONS
+ ", has been reached");
}
+ }
+ /**
+ * determine if there will be an issue writing the icon to memory
+ *
+ * @param account to enforce check on
+ * @throws IllegalArgumentException if writing the Icon to memory will cause an Exception
+ */
+ @VisibleForTesting
+ public void enforceIconSizeLimit(PhoneAccount account) {
+ if (account.getIcon() == null) {
+ return;
+ }
+ String text = "";
+ // convert the icon into a Base64 String
+ try {
+ text = XmlSerialization.writeIconToBase64String(account.getIcon());
+ } catch (IOException e) {
+ EventLog.writeEvent(0x534e4554, "259064622", Binder.getCallingUid(),
+ "enforceIconSizeLimit");
+ throw new IllegalArgumentException(ICON_ERROR_MSG);
+ }
+ }
- addOrReplacePhoneAccount(account);
+ /**
+ * All {@link PhoneAccount} and{@link PhoneAccountHandle} String and Char-Sequence fields
+ * should be restricted to character limit of MAX_PHONE_ACCOUNT_CHAR_LIMIT to prevent exceptions
+ * when writing large character streams to XML-Serializer.
+ *
+ * @param account to enforce character limit checks on
+ * @throws IllegalArgumentException if MAX_PHONE_ACCOUNT_FIELD_CHAR_LIMIT reached
+ */
+ public void enforceCharacterLimit(PhoneAccount account) {
+ if (account == null) {
+ return;
+ }
+ PhoneAccountHandle handle = account.getAccountHandle();
+
+ String[] fields =
+ {"Package Name", "Class Name", "PhoneAccountHandle Id", "Label", "ShortDescription",
+ "GroupId", "Address", "SubscriptionAddress"};
+ CharSequence[] args = {handle.getComponentName().getPackageName(),
+ handle.getComponentName().getClassName(), handle.getId(), account.getLabel(),
+ account.getShortDescription(), account.getGroupId(),
+ (account.getAddress() != null ? account.getAddress().toString() : ""),
+ (account.getSubscriptionAddress() != null ?
+ account.getSubscriptionAddress().toString() : "")};
+
+ for (int i = 0; i < fields.length; i++) {
+ if (args[i] != null && args[i].length() > MAX_PHONE_ACCOUNT_FIELD_CHAR_LIMIT) {
+ EventLog.writeEvent(0x534e4554, "259064622", Binder.getCallingUid(),
+ "enforceCharacterLimit");
+ throw new IllegalArgumentException("The PhoneAccount or PhoneAccountHandle"
+ + fields[i] + " field has an invalid character count. PhoneAccount and "
+ + "PhoneAccountHandle String and Char-Sequence fields are limited to "
+ + MAX_PHONE_ACCOUNT_FIELD_CHAR_LIMIT + " characters.");
+ }
+ }
+
+ // Enforce limits on the URI Schemes provided
+ enforceLimitsOnSchemes(account);
+
+ // Enforce limit on the PhoneAccount#mExtras
+ Bundle extras = account.getExtras();
+ if (extras != null) {
+ if (extras.keySet().size() > MAX_PHONE_ACCOUNT_EXTRAS_KEY_PAIR_LIMIT) {
+ EventLog.writeEvent(0x534e4554, "259064622", Binder.getCallingUid(),
+ "enforceCharacterLimit");
+ throw new IllegalArgumentException("The PhoneAccount#mExtras is limited to " +
+ MAX_PHONE_ACCOUNT_EXTRAS_KEY_PAIR_LIMIT + " (key,value) pairs.");
+ }
+
+ for (String key : extras.keySet()) {
+ Object value = extras.get(key);
+
+ if ((key != null && key.length() > MAX_PHONE_ACCOUNT_FIELD_CHAR_LIMIT) ||
+ (value instanceof String &&
+ ((String) value).length() > MAX_PHONE_ACCOUNT_FIELD_CHAR_LIMIT)) {
+ EventLog.writeEvent(0x534e4554, "259064622", Binder.getCallingUid(),
+ "enforceCharacterLimit");
+ throw new IllegalArgumentException("The PhoneAccount#mExtras contains a String"
+ + " key or value that has an invalid character count. PhoneAccount and "
+ + "PhoneAccountHandle String and Char-Sequence fields are limited to "
+ + MAX_PHONE_ACCOUNT_FIELD_CHAR_LIMIT + " characters.");
+ }
+ }
+ }
+ }
+
+ /**
+ * Enforce a character limit on all PA and PAH string or char-sequence fields.
+ *
+ * @param account to enforce check on
+ * @throws IllegalArgumentException if MAX_PHONE_ACCOUNT_FIELD_CHAR_LIMIT reached
+ */
+ @VisibleForTesting
+ public void enforceLimitsOnSchemes(@NonNull PhoneAccount account) {
+ List<String> schemes = account.getSupportedUriSchemes();
+
+ if (schemes == null) {
+ return;
+ }
+
+ if (schemes.size() > MAX_SCHEMES_PER_ACCOUNT) {
+ EventLog.writeEvent(0x534e4554, "259064622", Binder.getCallingUid(),
+ "enforceLimitsOnSchemes");
+ throw new IllegalArgumentException(
+ "Error, cannot register phone account " + account.getAccountHandle()
+ + " because the URI scheme limit of "
+ + MAX_SCHEMES_PER_ACCOUNT + " has been reached");
+ }
+
+ for (String scheme : schemes) {
+ if (scheme.length() > MAX_PHONE_ACCOUNT_FIELD_CHAR_LIMIT) {
+ EventLog.writeEvent(0x534e4554, "259064622", Binder.getCallingUid(),
+ "enforceLimitsOnSchemes");
+ throw new IllegalArgumentException(
+ "Error, cannot register phone account " + account.getAccountHandle()
+ + " because the max scheme limit of "
+ + MAX_PHONE_ACCOUNT_FIELD_CHAR_LIMIT + " has been reached");
+ }
+ }
}
/**
@@ -1489,17 +1641,20 @@ public class PhoneAccountRegistrar {
protected void writeIconIfNonNull(String tagName, Icon value, XmlSerializer serializer)
throws IOException {
if (value != null) {
- ByteArrayOutputStream stream = new ByteArrayOutputStream();
- value.writeToStream(stream);
- byte[] iconByteArray = stream.toByteArray();
- String text = Base64.encodeToString(iconByteArray, 0, iconByteArray.length, 0);
-
+ String text = writeIconToBase64String(value);
serializer.startTag(null, tagName);
serializer.text(text);
serializer.endTag(null, tagName);
}
}
+ public static String writeIconToBase64String(Icon icon) throws IOException {
+ ByteArrayOutputStream stream = new ByteArrayOutputStream();
+ icon.writeToStream(stream);
+ byte[] iconByteArray = stream.toByteArray();
+ return Base64.encodeToString(iconByteArray, 0, iconByteArray.length, 0);
+ }
+
protected void writeLong(String tagName, long value, XmlSerializer serializer)
throws IOException {
serializer.startTag(null, tagName);
diff --git a/src/com/android/server/telecom/TelecomServiceImpl.java b/src/com/android/server/telecom/TelecomServiceImpl.java
index d3bbab232..8c498fc55 100644
--- a/src/com/android/server/telecom/TelecomServiceImpl.java
+++ b/src/com/android/server/telecom/TelecomServiceImpl.java
@@ -63,7 +63,9 @@ import com.android.server.telecom.settings.BlockedNumbersActivity;
import java.io.FileDescriptor;
import java.io.PrintWriter;
import java.util.Collections;
+import java.util.HashSet;
import java.util.List;
+import java.util.Set;
// TODO: Needed for move to system service: import com.android.internal.R;
@@ -292,7 +294,7 @@ public class TelecomServiceImpl {
try {
Log.startSession("TSI.gPAFP");
return new ParceledListSlice<>(mPhoneAccountRegistrar
- .getPhoneAccountsForPackage(packageName, callingUserHandle));
+ .getAllPhoneAccountHandlesForPackage(callingUserHandle, packageName));
} catch (Exception e) {
Log.e(this, e, "getPhoneAccountsForPackage %s", packageName);
throw e;
diff --git a/tests/src/com/android/server/telecom/tests/PhoneAccountRegistrarTest.java b/tests/src/com/android/server/telecom/tests/PhoneAccountRegistrarTest.java
index a978cfd24..f14a3f74e 100644
--- a/tests/src/com/android/server/telecom/tests/PhoneAccountRegistrarTest.java
+++ b/tests/src/com/android/server/telecom/tests/PhoneAccountRegistrarTest.java
@@ -22,8 +22,18 @@ import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyObject;
+import static org.mockito.ArgumentMatchers.isA;
import static org.mockito.Matchers.anyInt;
import static org.mockito.Matchers.anyString;
+import static org.mockito.Mockito.clearInvocations;
+import static org.mockito.Mockito.doThrow;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
import android.content.ComponentName;
@@ -69,6 +79,8 @@ import java.io.BufferedOutputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
+import java.io.IOException;
+import java.io.OutputStream;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
@@ -80,6 +92,9 @@ public class PhoneAccountRegistrarTest extends TelecomTestCase {
private static final int MAX_VERSION = Integer.MAX_VALUE;
private static final String FILE_NAME = "phone-account-registrar-test-1223.xml";
private static final String TEST_LABEL = "right";
+ private static final String TEST_ID = "123";
+ private final String PACKAGE_1 = "PACKAGE_1";
+ private final String PACKAGE_2 = "PACKAGE_2";
private PhoneAccountRegistrar mRegistrar;
@Mock private TelecomManager mTelecomManager;
@Mock private DefaultDialerCache mDefaultDialerCache;
@@ -942,6 +957,92 @@ public class PhoneAccountRegistrarTest extends TelecomTestCase {
assertFalse(PhoneAccountHandle.areFromSamePackage(null, d));
}
+ /**
+ * Ensure an IllegalArgumentException is thrown when adding more than 10 schemes for a single
+ * account
+ */
+ @Test
+ public void testLimitOnSchemeCount() {
+ PhoneAccountHandle handle = makeQuickAccountHandle(TEST_ID);
+ PhoneAccount.Builder builder = new PhoneAccount.Builder(handle, TEST_LABEL);
+ for (int i = 0; i < PhoneAccountRegistrar.MAX_PHONE_ACCOUNT_REGISTRATIONS + 1; i++) {
+ builder.addSupportedUriScheme(Integer.toString(i));
+ }
+ try {
+ mRegistrar.enforceLimitsOnSchemes(builder.build());
+ fail("should have hit exception in enforceLimitOnSchemes");
+ } catch (IllegalArgumentException e) {
+ // pass test
+ }
+ }
+
+ /**
+ * Ensure an IllegalArgumentException is thrown when adding more 256 chars for a single
+ * account
+ */
+ @Test
+ public void testLimitOnSchemeLength() {
+ PhoneAccountHandle handle = makeQuickAccountHandle(TEST_ID);
+ PhoneAccount.Builder builder = new PhoneAccount.Builder(handle, TEST_LABEL);
+ builder.addSupportedUriScheme(generateStringOfLen(257));
+ try {
+ mRegistrar.enforceLimitsOnSchemes(builder.build());
+ fail("should have hit exception in enforceLimitOnSchemes");
+ } catch (IllegalArgumentException e) {
+ // pass test
+ }
+ }
+
+ /**
+ * Ensure an IllegalArgumentException is thrown when adding an address over the limit
+ */
+ @Test
+ public void testLimitOnAddress() {
+ String text = generateStringOfLen(100);
+ PhoneAccountHandle handle = makeQuickAccountHandle(TEST_ID);
+ PhoneAccount.Builder builder = new PhoneAccount.Builder(handle,TEST_LABEL)
+ .setAddress(Uri.fromParts(text, text, text));
+ try {
+ mRegistrar.enforceCharacterLimit(builder.build());
+ fail("failed to throw IllegalArgumentException");
+ } catch (IllegalArgumentException e) {
+ // pass test
+ }
+ finally {
+ mRegistrar.unregisterPhoneAccount(handle);
+ }
+ }
+
+ /**
+ * Ensure an IllegalArgumentException is thrown when an Icon that throws an IOException is given
+ */
+ @Test
+ public void testLimitOnIcon() throws Exception {
+ Icon mockIcon = mock(Icon.class);
+ // GIVEN
+ PhoneAccount.Builder builder = new PhoneAccount.Builder(
+ makeQuickAccountHandle(TEST_ID), TEST_LABEL).setIcon(mockIcon);
+ try {
+ // WHEN
+ Mockito.doThrow(new IOException())
+ .when(mockIcon).writeToStream(any(OutputStream.class));
+ //THEN
+ mRegistrar.enforceIconSizeLimit(builder.build());
+ fail("failed to throw IllegalArgumentException");
+ } catch (IllegalArgumentException e) {
+ // pass test
+ assertTrue(e.getMessage().contains(PhoneAccountRegistrar.ICON_ERROR_MSG));
+ }
+ }
+
+ private String generateStringOfLen(int len){
+ StringBuilder sb = new StringBuilder();
+ for(int i=0; i < len; i++){
+ sb.append("a");
+ }
+ return sb.toString();
+ }
+
private static ComponentName makeQuickConnectionServiceComponentName() {
return new ComponentName(
"com.android.server.telecom.tests",
diff --git a/tests/src/com/android/server/telecom/tests/TelecomServiceImplTest.java b/tests/src/com/android/server/telecom/tests/TelecomServiceImplTest.java
index 2130121ac..00d8000e4 100644
--- a/tests/src/com/android/server/telecom/tests/TelecomServiceImplTest.java
+++ b/tests/src/com/android/server/telecom/tests/TelecomServiceImplTest.java
@@ -392,7 +392,7 @@ public class TelecomServiceImplTest extends TelecomTestCase {
add(SIP_PA_HANDLE_17);
}};
when(mFakePhoneAccountRegistrar
- .getPhoneAccountsForPackage(anyString(), any(UserHandle.class)))
+ .getAllPhoneAccountHandlesForPackage(any(UserHandle.class), anyString()))
.thenReturn(phoneAccountHandleList);
makeAccountsVisibleToAllUsers(TEL_PA_HANDLE_16, SIP_PA_HANDLE_17);
assertEquals(phoneAccountHandleList,
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