Add getter for apps with auth-bound keys

Add a method to get the list of apps that have auth-bound keys bound to
a specific SID.

Bug: 302109605
Test: Manual, installed an app that creates auth-bound keys and observed
      it is included in the list of apps that have auth-bound keys.
      A CtsVerifier is forthcoming.
Change-Id: Id41398bd29e6f80f963b142bb16719761308198e

1 files changed, 25 insertions, 0 deletions

diff --git a/keystore/java/android/security/AndroidKeyStoreMaintenance.java b/keystore/java/android/security/AndroidKeyStoreMaintenance.java
index 2beb434566e5..2430e8d8e662 100644
--- a/keystore/java/android/security/AndroidKeyStoreMaintenance.java
+++ b/keystore/java/android/security/AndroidKeyStoreMaintenance.java
@@ -18,6 +18,7 @@ package android.security;
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
+import android.os.RemoteException;
 import android.os.ServiceManager;
 import android.os.ServiceSpecificException;
 import android.os.StrictMode;
@@ -218,4 +219,28 @@ public class AndroidKeyStoreMaintenance {
             return SYSTEM_ERROR;
         }
     }
+
+    /**
+     * Returns the list of Application UIDs that have auth-bound keys that are bound to
+     * the given SID. This enables warning the user when they are about to invalidate
+     * a SID (for example, removing the LSKF).
+     *
+     * @param userId - The ID of the user the SID is associated with.
+     * @param userSecureId - The SID in question.
+     *
+     * @return A list of app UIDs.
+     */
+    public static long[] getAllAppUidsAffectedBySid(int userId, long userSecureId)
+            throws KeyStoreException {
+        StrictMode.noteDiskWrite();
+        try {
+            return getService().getAppUidsAffectedBySid(userId, userSecureId);
+        } catch (RemoteException | NullPointerException e) {
+            throw new KeyStoreException(SYSTEM_ERROR,
+                    "Failure to connect to Keystore while trying to get apps affected by SID.");
+        } catch (ServiceSpecificException e) {
+            throw new KeyStoreException(e.errorCode,
+                    "Keystore error while trying to get apps affected by SID.");
+        }
+    }
 }