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[automerger] RESTRICT AUTOMERGE: Recover shady content:// paths. am: 301d17e4dd am: 010585fe3c am: 6ef77aedac am: ae30765665

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Change-Id: I0cd990dcdfb899fa419cf1b28934d4118c225937
This commit is contained in:
Android Build Merger (Role)
2018-10-05 00:19:37 +00:00
parent 976625d9c1 ae30765665
commit 50e06f25ac
2 changed files with 35 additions and 32 deletions
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51
core/java/android/content/ContentProvider.java
View File

@@ -53,6 +53,7 @@ import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Objects;
/**
* Content providers are one of the primary building blocks of Android applications, providing
@@ -207,7 +208,7 @@ public abstract class ContentProvider implements ComponentCallbacks2 {
public Cursor query(String callingPkg, Uri uri, String[] projection,
String selection, String[] selectionArgs, String sortOrder,
ICancellationSignal cancellationSignal) {
validateIncomingUri(uri);
uri = validateIncomingUri(uri);
uri = getUriWithoutUserId(uri);
if (enforceReadPermission(callingPkg, uri, null) != AppOpsManager.MODE_ALLOWED) {
// The caller has no access to the data, so return an empty cursor with
@@ -246,14 +247,14 @@ public abstract class ContentProvider implements ComponentCallbacks2 {
@Override
public String getType(Uri uri) {
validateIncomingUri(uri);
uri = validateIncomingUri(uri);
uri = getUriWithoutUserId(uri);
return ContentProvider.this.getType(uri);
}
@Override
public Uri insert(String callingPkg, Uri uri, ContentValues initialValues) {
validateIncomingUri(uri);
uri = validateIncomingUri(uri);
int userId = getUserIdFromUri(uri);
uri = getUriWithoutUserId(uri);
if (enforceWritePermission(callingPkg, uri, null) != AppOpsManager.MODE_ALLOWED) {
@@ -269,7 +270,7 @@ public abstract class ContentProvider implements ComponentCallbacks2 {
@Override
public int bulkInsert(String callingPkg, Uri uri, ContentValues[] initialValues) {
validateIncomingUri(uri);
uri = validateIncomingUri(uri);
uri = getUriWithoutUserId(uri);
if (enforceWritePermission(callingPkg, uri, null) != AppOpsManager.MODE_ALLOWED) {
return 0;
@@ -291,11 +292,12 @@ public abstract class ContentProvider implements ComponentCallbacks2 {
for (int i = 0; i < numOperations; i++) {
ContentProviderOperation operation = operations.get(i);
Uri uri = operation.getUri();
validateIncomingUri(uri);
userIds[i] = getUserIdFromUri(uri);
if (userIds[i] != UserHandle.USER_CURRENT) {
// Removing the user id from the uri.
operation = new ContentProviderOperation(operation, true);
uri = validateIncomingUri(uri);
uri = getUriWithoutUserId(uri);
// Rebuild operation if we changed the Uri above
if (!Objects.equals(operation.getUri(), uri)) {
operation = new ContentProviderOperation(operation, uri);
operations.set(i, operation);
}
if (operation.isReadOperation()) {
@@ -330,7 +332,7 @@ public abstract class ContentProvider implements ComponentCallbacks2 {
@Override
public int delete(String callingPkg, Uri uri, String selection, String[] selectionArgs) {
validateIncomingUri(uri);
uri = validateIncomingUri(uri);
uri = getUriWithoutUserId(uri);
if (enforceWritePermission(callingPkg, uri, null) != AppOpsManager.MODE_ALLOWED) {
return 0;
@@ -346,7 +348,7 @@ public abstract class ContentProvider implements ComponentCallbacks2 {
@Override
public int update(String callingPkg, Uri uri, ContentValues values, String selection,
String[] selectionArgs) {
validateIncomingUri(uri);
uri = validateIncomingUri(uri);
uri = getUriWithoutUserId(uri);
if (enforceWritePermission(callingPkg, uri, null) != AppOpsManager.MODE_ALLOWED) {
return 0;
@@ -363,7 +365,7 @@ public abstract class ContentProvider implements ComponentCallbacks2 {
public ParcelFileDescriptor openFile(
String callingPkg, Uri uri, String mode, ICancellationSignal cancellationSignal,
IBinder callerToken) throws FileNotFoundException {
validateIncomingUri(uri);
uri = validateIncomingUri(uri);
uri = getUriWithoutUserId(uri);
enforceFilePermission(callingPkg, uri, mode, callerToken);
final String original = setCallingPackage(callingPkg);
@@ -379,7 +381,7 @@ public abstract class ContentProvider implements ComponentCallbacks2 {
public AssetFileDescriptor openAssetFile(
String callingPkg, Uri uri, String mode, ICancellationSignal cancellationSignal)
throws FileNotFoundException {
validateIncomingUri(uri);
uri = validateIncomingUri(uri);
uri = getUriWithoutUserId(uri);
enforceFilePermission(callingPkg, uri, mode, null);
final String original = setCallingPackage(callingPkg);
@@ -405,7 +407,7 @@ public abstract class ContentProvider implements ComponentCallbacks2 {
@Override
public String[] getStreamTypes(Uri uri, String mimeTypeFilter) {
validateIncomingUri(uri);
uri = validateIncomingUri(uri);
uri = getUriWithoutUserId(uri);
return ContentProvider.this.getStreamTypes(uri, mimeTypeFilter);
}
@@ -414,7 +416,7 @@ public abstract class ContentProvider implements ComponentCallbacks2 {
public AssetFileDescriptor openTypedAssetFile(String callingPkg, Uri uri, String mimeType,
Bundle opts, ICancellationSignal cancellationSignal) throws FileNotFoundException {
Bundle.setDefusable(opts, true);
validateIncomingUri(uri);
uri = validateIncomingUri(uri);
uri = getUriWithoutUserId(uri);
enforceFilePermission(callingPkg, uri, "r", null);
final String original = setCallingPackage(callingPkg);
@@ -433,7 +435,7 @@ public abstract class ContentProvider implements ComponentCallbacks2 {
@Override
public Uri canonicalize(String callingPkg, Uri uri) {
validateIncomingUri(uri);
uri = validateIncomingUri(uri);
int userId = getUserIdFromUri(uri);
uri = getUriWithoutUserId(uri);
if (enforceReadPermission(callingPkg, uri, null) != AppOpsManager.MODE_ALLOWED) {
@@ -449,7 +451,7 @@ public abstract class ContentProvider implements ComponentCallbacks2 {
@Override
public Uri uncanonicalize(String callingPkg, Uri uri) {
validateIncomingUri(uri);
uri = validateIncomingUri(uri);
int userId = getUserIdFromUri(uri);
uri = getUriWithoutUserId(uri);
if (enforceReadPermission(callingPkg, uri, null) != AppOpsManager.MODE_ALLOWED) {
@@ -1735,7 +1737,7 @@ public abstract class ContentProvider implements ComponentCallbacks2 {
*/
if (mContext == null) {
mContext = context;
if (context != null) {
if (context != null && mTransport != null) {
mTransport.mAppOpsManager = (AppOpsManager) context.getSystemService(
Context.APP_OPS_SERVICE);
}
@@ -1844,7 +1846,7 @@ public abstract class ContentProvider implements ComponentCallbacks2 {
}
/** @hide */
private void validateIncomingUri(Uri uri) throws SecurityException {
public Uri validateIncomingUri(Uri uri) throws SecurityException {
String auth = uri.getAuthority();
int userId = getUserIdFromAuthority(auth, UserHandle.USER_CURRENT);
if (userId != UserHandle.USER_CURRENT && userId != mContext.getUserId()) {
@@ -1861,6 +1863,19 @@ public abstract class ContentProvider implements ComponentCallbacks2 {
}
throw new SecurityException(message);
}
// Normalize the path by removing any empty path segments, which can be
// a source of security issues.
final String encodedPath = uri.getEncodedPath();
if (encodedPath != null && encodedPath.indexOf("//") != -1) {
final Uri normalized = uri.buildUpon()
.encodedPath(encodedPath.replaceAll("//+", "/")).build();
Log.w(TAG, "Normalized " + uri + " to " + normalized
+ " to avoid possible security issues");
return normalized;
} else {
return uri;
}
}
/** @hide */

16
core/java/android/content/ContentProviderOperation.java
View File

@@ -94,13 +94,9 @@ public class ContentProviderOperation implements Parcelable {
}
/** @hide */
public ContentProviderOperation(ContentProviderOperation cpo, boolean removeUserIdFromUri) {
public ContentProviderOperation(ContentProviderOperation cpo, Uri withUri) {
mType = cpo.mType;
if (removeUserIdFromUri) {
mUri = ContentProvider.getUriWithoutUserId(cpo.mUri);
} else {
mUri = cpo.mUri;
}
mUri = withUri;
mValues = cpo.mValues;
mSelection = cpo.mSelection;
mSelectionArgs = cpo.mSelectionArgs;
@@ -110,14 +106,6 @@ public class ContentProviderOperation implements Parcelable {
mYieldAllowed = cpo.mYieldAllowed;
}
/** @hide */
public ContentProviderOperation getWithoutUserIdInUri() {
if (ContentProvider.uriHasUserId(mUri)) {
return new ContentProviderOperation(this, true);
}
return this;
}
public void writeToParcel(Parcel dest, int flags) {
dest.writeInt(mType);
Uri.writeToParcel(dest, mUri);