Add CredentialInstaller.

src/com/android/settings/CredentialInstaller.java

@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2009 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 com.android.settings;
+
+import android.app.Activity;
+import android.content.Intent;
+import android.os.Bundle;
+import android.security.Credentials;
+import android.security.KeyStore;
+import android.util.Log;
+
+/**
+ * Installs credentials to the system keystore. It reacts to the
+ * {@link Credentials#SYSTEM_INSTALL_ACTION} intent. All the key-value pairs in
+ * the intent are installed to the system keystore. For security reason, the
+ * current implementation limits that only com.android.certinstaller can use
+ * this service.
+ */
+public class CredentialInstaller extends Activity {
+    private static final String TAG = "CredentialInstaller";
+
+    private KeyStore mKeyStore = KeyStore.getInstance();
+    private boolean mUnlocking = false;
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+
+        if (!"com.android.certinstaller".equals(getCallingPackage())) finish();
+
+        if (!isKeyStoreLocked()) {
+            install();
+            finish();
+        } else if (!mUnlocking) {
+            mUnlocking = true;
+            Credentials.getInstance().unlock(this);
+        } else {
+            finish();
+        }
+    }
+
+    private void install() {
+        Intent intent = getIntent();
+        Bundle bundle = (intent == null) ? null : intent.getExtras();
+        if (bundle == null) return;
+        for (String key : bundle.keySet()) {
+            byte[] data = bundle.getByteArray(key);
+            if (data == null) continue;
+            boolean success = mKeyStore.put(key.getBytes(), data);
+            Log.v(TAG, "install " + key + ": " + data.length + "  success? " + success);
+            if (!success) return;
+        }
+        setResult(RESULT_OK);
+    }
+
+    private boolean isKeyStoreLocked() {
+        return (mKeyStore.test() != KeyStore.NO_ERROR);
+    }
+}