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Code Issues Projects Releases Wiki Activity

Updated patch to handle dynamic permissions.

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This commit is contained in:
Wenzel Pünter 2016-03-04 12:39:00 +01:00
parent 33825840a3
commit c2fc6830d7
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1 changed files with 51 additions and 48 deletions
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99
patches/android_frameworks_base-M.patch
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@ -1,52 +1,21 @@
diff --git a/core/java/android/content/pm/PackageParser.java b/core/java/android/content/pm/PackageParser.java
index 99bd390..2ea7722 100644
--- a/core/java/android/content/pm/PackageParser.java
+++ b/core/java/android/content/pm/PackageParser.java
@@ -578,10 +578,22 @@ public class PackageParser {
}
}
if ((flags&PackageManager.GET_SIGNATURES) != 0) {
- int N = (p.mSignatures != null) ? p.mSignatures.length : 0;
- if (N > 0) {
- pi.signatures = new Signature[N];
- System.arraycopy(p.mSignatures, 0, pi.signatures, 0, N);
+ boolean handledFakeSignature = false;
+ try {
+ if (p.requestedPermissions.contains("android.permission.FAKE_PACKAGE_SIGNATURE") && p.mAppMetaData != null &&
p.mAppMetaData.get("fake-signature") instanceof String) {
+ pi.signatures = new Signature[] {new Signature(p.mAppMetaData.getString("fake-signature"))};
+ handledFakeSignature = true;
+ }
+ } catch (Throwable t) {
+ //We should never die because of any failures, this is system code!
+ Log.w("PackageParser.FAKE_PACKAGE_SIGNATURE", t);
+ }
+ if (!handledFakeSignature) {
+ int N = (p.mSignatures != null) ? p.mSignatures.length : 0;
+ if (N > 0) {
+ pi.signatures = new Signature[N];
+ System.arraycopy(p.mSignatures, 0, pi.signatures, 0, N);
+ }
}
}
return pi;
diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xml
index 08bccc1..93afc86 100644
index 08bccc1..45b0094 100644
--- a/core/res/AndroidManifest.xml
+++ b/core/res/AndroidManifest.xml
@@ -1623,6 +1623,12 @@
@@ -1622,6 +1622,13 @@
android:label="@string/permlab_getPackageSize"
android:description="@string/permdesc_getPackageSize"
android:protectionLevel="normal" />
+
+ <!-- @hide Allows an application to change the package signature as
+ seen by applications -->
+ <permission android:name="android.permission.FAKE_PACKAGE_SIGNATURE"
+ android:permissionGroup="android.permission-group.SYSTEM_TOOLS"
+ android:protectionLevel="dangerous"
+ android:label="@string/permlab_fakePackageSignature"
+ android:description="@string/permdesc_fakePackageSignature" />
+
+ android:protectionLevel="dangerous"
+ android:label="@string/permlab_fakePackageSignature"
+ android:description="@string/permdesc_fakePackageSignature" />
<!-- @deprecated No longer useful, see
{@link android.content.pm.PackageManager#addPackageToPreferred}
for details. -->
diff --git a/core/res/res/values/config.xml b/core/res/res/values/config.xml
index 6c96f84..c391f30 100644
--- a/core/res/res/values/config.xml
@ -61,16 +30,50 @@ index 6c96f84..c391f30 100644
<!-- This string array can be overriden to enable test location providers initially. -->
diff --git a/core/res/res/values/strings.xml b/core/res/res/values/strings.xml
index 8a9b9cf..d4ad231 100644
index 8a9b9cf..cd7ec0d 100644
--- a/core/res/res/values/strings.xml
+++ b/core/res/res/values/strings.xml
@@ -763,6 +763,9 @@
<!-- Description of an application permission, listed so the user can choose whether they want to allow the application to do this. -->
<string name="permdesc_getPackageSize">Allows the app to retrieve its code, data, and cache sizes</string>
@@ -615,6 +615,11 @@
+ <string name="permlab_fakePackageSignature">mimic package signature</string>
+ <string name="permdesc_fakePackageSignature">Allows the app to use mimic another app\'s package signature.</string>
<!-- Permissions -->
+ <!-- Title of an application permission, listed so the user can choose whether they want to allow the application to do this. -->
+ <string name="permlab_fakePackageSignature">Spoof package signature</string>
+ <!-- Description of an application permission, listed so the user can choose whether they want to allow the application to do this. -->
+ <string name="permdesc_fakePackageSignature">Allows the app to pretend to be a different app. Malicious applications might be able to use this to access private application data. Grant this permission with caution only!</string>
+
<!-- Title of an application permission, listed so the user can choose whether they want to allow the application to do this. -->
<string name="permlab_writeSettings">modify system settings</string>
<string name="permlab_statusBar">disable or modify status bar</string>
<!-- Description of an application permission, listed so the user can choose whether they want to allow the application to do this. -->
diff --git a/services/core/java/com/android/server/pm/PackageManagerService.java b/services/core/java/com/android/server/pm/PackageManagerService.java
index c1d091b..8195e32 100644
--- a/services/core/java/com/android/server/pm/PackageManagerService.java
+++ b/services/core/java/com/android/server/pm/PackageManagerService.java
@@ -2653,8 +2653,27 @@ public class PackageManagerService extends IPackageManager.Stub {
final Set<String> permissions = permissionsState.getPermissions(userId);
final PackageUserState state = ps.readUserState(userId);
- return PackageParser.generatePackageInfo(p, gids, flags,
- ps.firstInstallTime, ps.lastUpdateTime, permissions, state, userId);
+ return mayFakeSignature(p, PackageParser.generatePackageInfo(p, gids, flags,
+ ps.firstInstallTime, ps.lastUpdateTime, permissions, state, userId),
+ permissions);
+ }
+
+ private PackageInfo mayFakeSignature(PackageParser.Package p, PackageInfo pi,
+ Set<String> permissions) {
+ try {
+ if (permissions.contains("android.permission.FAKE_PACKAGE_SIGNATURE")
+ && p.applicationInfo.targetSdkVersion > Build.VERSION_CODES.LOLLIPOP_MR1
+ && p.mAppMetaData != null) {
+ String sig = p.mAppMetaData.getString("fake-signature");
+ if (sig != null) {
+ pi.signatures = new Signature[] {new Signature(sig)};
+ }
+ }
+ } catch (Throwable t) {
+ // We should never die because of any failures, this is system code!
+ Log.w("PackageManagerService.FAKE_PACKAGE_SIGNATURE", t);
+ }
+ return pi;
}