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Added: Add functions to PackageUtils to get seInfo and seInfoUser of package

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agnostic-apollo
2022-06-11 14:11:58 +05:00
parent 5759411109
commit 1788013c80
1 changed files with 49 additions and 0 deletions
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49
termux-shared/src/main/java/com/termux/shared/android/PackageUtils.java
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@@ -196,6 +196,55 @@ public class PackageUtils {
}
}
/**
* Get the {@code seInfo} {@link Field} of the {@link ApplicationInfo} class.
*
* String retrieved from the seinfo tag found in selinux policy. This value can be set through
* the mac_permissions.xml policy construct. This value is used for setting an SELinux security
* context on the process as well as its data directory.
*
* https://cs.android.com/android/platform/superproject/+/android-7.1.0_r1:frameworks/base/core/java/android/content/pm/ApplicationInfo.java;l=609
* https://cs.android.com/android/platform/superproject/+/android-12.0.0_r32:frameworks/base/core/java/android/content/pm/ApplicationInfo.java;l=981
* https://cs.android.com/android/platform/superproject/+/android-7.0.0_r1:frameworks/base/services/core/java/com/android/server/pm/SELinuxMMAC.java;l=282
* https://cs.android.com/android/platform/superproject/+/android-12.0.0_r32:frameworks/base/services/core/java/com/android/server/pm/SELinuxMMAC.java;l=375
* https://cs.android.com/android/_/android/platform/frameworks/base/+/be0b8896d1bc385d4c8fb54c21929745935dcbea
*
* @param applicationInfo The {@link ApplicationInfo} for the package.
* @return Returns the selinux info or {@code null} if an exception was raised.
*/
@Nullable
public static String getApplicationInfoSeInfoForPackage(@NonNull final ApplicationInfo applicationInfo) {
ReflectionUtils.bypassHiddenAPIReflectionRestrictions();
try {
return (String) ReflectionUtils.invokeField(ApplicationInfo.class, Build.VERSION.SDK_INT < Build.VERSION_CODES.O ? "seinfo" : "seInfo", applicationInfo).value;
} catch (Exception e) {
// ClassCastException may be thrown
Logger.logStackTraceWithMessage(LOG_TAG, "Failed to get seInfo field value for ApplicationInfo class", e);
return null;
}
}
/**
* Get the {@code seInfoUser} {@link Field} of the {@link ApplicationInfo} class.
*
* Also check {@link #getApplicationInfoSeInfoForPackage(ApplicationInfo)}.
*
* @param applicationInfo The {@link ApplicationInfo} for the package.
* @return Returns the selinux info user or {@code null} if an exception was raised.
*/
@Nullable
public static String getApplicationInfoSeInfoUserForPackage(@NonNull final ApplicationInfo applicationInfo) {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) return null;
ReflectionUtils.bypassHiddenAPIReflectionRestrictions();
try {
return (String) ReflectionUtils.invokeField(ApplicationInfo.class, "seInfoUser", applicationInfo).value;
} catch (Exception e) {
// ClassCastException may be thrown
Logger.logStackTraceWithMessage(LOG_TAG, "Failed to get seInfoUser field value for ApplicationInfo class", e);
return null;
}
}
/**
* Get the {@code privateFlags} {@link Field} of the {@link ApplicationInfo} class.
*