Keystore: Surface service error message

Surface the service-specific error message. To avoid API changes, the
error message is surfaced in the toString / getMessage methods.

Test: atest android.security.keystore.KeyStoreExceptionTest
Bug: 217593122
Change-Id: Id4090564b46db9b3b10ea390390f6683f7314463

1 files changed, 44 insertions, 0 deletions

diff --git a/keystore/tests/src/android/security/keystore/KeyStoreExceptionTest.java b/keystore/tests/src/android/security/keystore/KeyStoreExceptionTest.java
new file mode 100644
index 000000000000..31c742289a61
--- /dev/null
+++ b/keystore/tests/src/android/security/keystore/KeyStoreExceptionTest.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.security.keystore;
+
+import static org.junit.Assert.assertTrue;
+
+import android.security.KeyStoreException;
+
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(AndroidJUnit4.class)
+public class KeyStoreExceptionTest {
+    @Test
+    public void testKeystoreMessageIsIncluded() {
+        final String primaryMessage = "some_message";
+        final String keystoreMessage = "ks_message";
+        KeyStoreException exception = new KeyStoreException(-1, primaryMessage, keystoreMessage);
+
+        String exceptionMessage = exception.getMessage();
+        assertTrue(exceptionMessage.contains(primaryMessage));
+        assertTrue(exceptionMessage.contains(keystoreMessage));
+
+        String exceptionString = exception.toString();
+        assertTrue(exceptionString.contains(primaryMessage));
+        assertTrue(exceptionString.contains(keystoreMessage));
+    }
+}