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authorBen Gruver <bgruv@google.com>2012-09-27 12:58:33 -0700
committerBen Gruver <bgruv@google.com>2012-09-27 16:08:25 -0700
commitd58f150060e9300038ff86eeeffc86c2440303c8 (patch)
tree97986d66cc953135756f66a4fdb70b7a5d3b95c9
parent4dca31bdc6ef612c8c77af14dc5f700c32fa938e (diff)
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Determine the originating uid for an install
Bug: 6923241 Change-Id: I281301ca0bece2cb2395cde1d7652be168ffa202
-rwxr-xr-xsrc/com/android/packageinstaller/InstallAppProgress.java4
-rw-r--r--src/com/android/packageinstaller/PackageInstallerActivity.java82
2 files changed, 84 insertions, 2 deletions
diff --git a/src/com/android/packageinstaller/InstallAppProgress.java b/src/com/android/packageinstaller/InstallAppProgress.java
index e281fd3..fc82078 100755
--- a/src/com/android/packageinstaller/InstallAppProgress.java
+++ b/src/com/android/packageinstaller/InstallAppProgress.java
@@ -252,8 +252,10 @@ public class InstallAppProgress extends Activity implements View.OnClickListener
Intent.EXTRA_INSTALLER_PACKAGE_NAME);
Uri originatingURI = getIntent().getParcelableExtra(Intent.EXTRA_ORIGINATING_URI);
Uri referrer = getIntent().getParcelableExtra(Intent.EXTRA_REFERRER);
+ int originatingUid = getIntent().getIntExtra(Intent.EXTRA_ORIGINATING_UID,
+ VerificationParams.NO_UID);
VerificationParams verificationParams = new VerificationParams(null, originatingURI,
- referrer, null);
+ referrer, originatingUid, null);
PackageInstallObserver observer = new PackageInstallObserver();
if ("package".equals(mPackageURI.getScheme())) {
diff --git a/src/com/android/packageinstaller/PackageInstallerActivity.java b/src/com/android/packageinstaller/PackageInstallerActivity.java
index d3b2a94..a0546a2 100644
--- a/src/com/android/packageinstaller/PackageInstallerActivity.java
+++ b/src/com/android/packageinstaller/PackageInstallerActivity.java
@@ -17,6 +17,7 @@
package com.android.packageinstaller;
import android.app.Activity;
+import android.app.ActivityManagerNative;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.Context;
@@ -30,6 +31,7 @@ import android.content.pm.PackageManager;
import android.content.pm.PackageUserState;
import android.content.pm.PackageManager.NameNotFoundException;
import android.content.pm.PackageParser;
+import android.content.pm.VerificationParams;
import android.graphics.Rect;
import android.net.Uri;
import android.os.Bundle;
@@ -66,6 +68,8 @@ public class PackageInstallerActivity extends Activity implements OnCancelListen
private Uri mPackageURI;
private Uri mOriginatingURI;
private Uri mReferrerURI;
+ private int mOriginatingUid = VerificationParams.NO_UID;
+
private boolean localLOGV = false;
PackageManager mPm;
PackageInfo mPkgInfo;
@@ -523,6 +527,8 @@ public class PackageInstallerActivity extends Activity implements OnCancelListen
mInstallConfirm.setVisibility(View.INVISIBLE);
PackageUtil.initSnippetForNewApp(this, as, R.id.app_snippet);
+ mOriginatingUid = getOriginatingUid(intent);
+
// Deal with install source.
String callerPackage = getCallingPackage();
if (callerPackage != null && intent.getBooleanExtra(
@@ -562,7 +568,78 @@ public class PackageInstallerActivity extends Activity implements OnCancelListen
}
initiateInstall();
}
-
+
+ /** Get the ApplicationInfo for the calling package, if available */
+ private ApplicationInfo getSourceInfo() {
+ String callingPackage = getCallingPackage();
+ if (callingPackage != null) {
+ try {
+ return mPm.getApplicationInfo(callingPackage, 0);
+ } catch (NameNotFoundException ex) {
+ // ignore
+ }
+ }
+ return null;
+ }
+
+
+ /** Get the originating uid if possible, or VerificationParams.NO_UID if not available */
+ private int getOriginatingUid(Intent intent) {
+ // The originating uid from the intent. We only trust/use this if it comes from a
+ // system application
+ int uidFromIntent = intent.getIntExtra(Intent.EXTRA_ORIGINATING_UID,
+ VerificationParams.NO_UID);
+
+ // Get the source info from the calling package, if available. This will be the
+ // definitive calling package, but it only works if the intent was started using
+ // startActivityForResult,
+ ApplicationInfo sourceInfo = getSourceInfo();
+ if (sourceInfo != null) {
+ if (uidFromIntent != VerificationParams.NO_UID &&
+ (mSourceInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0) {
+ return uidFromIntent;
+
+ }
+ // We either didn't get a uid in the intent, or we don't trust it. Use the
+ // uid of the calling package instead.
+ return sourceInfo.uid;
+ }
+
+ // We couldn't get the specific calling package. Let's get the uid instead
+ int callingUid;
+ try {
+ callingUid = ActivityManagerNative.getDefault()
+ .getLaunchedFromUid(getActivityToken());
+ } catch (android.os.RemoteException ex) {
+ Log.w(TAG, "Could not determine the launching uid.");
+ // nothing else we can do
+ return VerificationParams.NO_UID;
+ }
+
+ // If we got a uid from the intent, we need to verify that the caller is a
+ // system package before we use it
+ if (uidFromIntent != VerificationParams.NO_UID) {
+ String[] callingPackages = mPm.getPackagesForUid(callingUid);
+ if (callingPackages != null) {
+ for (String packageName: callingPackages) {
+ try {
+ ApplicationInfo applicationInfo =
+ mPm.getApplicationInfo(packageName, 0);
+
+ if ((applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0) {
+ return uidFromIntent;
+ }
+ } catch (NameNotFoundException ex) {
+ // ignore it, and try the next package
+ }
+ }
+ }
+ }
+ // We either didn't get a uid from the intent, or we don't trust it. Use the
+ // calling uid instead.
+ return callingUid;
+ }
+
// Generic handling when pressing back key
public void onCancel(DialogInterface dialog) {
finish();
@@ -585,6 +662,9 @@ public class PackageInstallerActivity extends Activity implements OnCancelListen
if (mReferrerURI != null) {
newIntent.putExtra(Intent.EXTRA_REFERRER, mReferrerURI);
}
+ if (mOriginatingUid != VerificationParams.NO_UID) {
+ newIntent.putExtra(Intent.EXTRA_ORIGINATING_UID, mOriginatingUid);
+ }
if (installerPackageName != null) {
newIntent.putExtra(Intent.EXTRA_INSTALLER_PACKAGE_NAME,
installerPackageName);