Ability to persist RTCCertificate in IndexedDB (enables cloning).

chrome/test/data/webrtc/indexeddb.js

+/**
+ * Copyright 2016 The Chromium Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/** @private */
+var kDatabaseName = 'WebRTC-Database';
+
+/**
+ * The one and only |IDBDatabase| in this page.
+ * @private
+ */
+var gDatabase = null;
+
+/**
+ * Set by |generateAndCloneCertificate|.
+ */
+var gCertificate = null;
+var gCertificateClone = null;
+
+// Public interface to tests. These are expected to be called with
+// ExecuteJavascript invocations from the browser tests and will return answers
+// through the DOM automation controller.
+
+function openDatabase() {
+  if (gDatabase !== null)
+    throw failTest('The database is already open.');
+  var reqOpen = indexedDB.open(kDatabaseName);
+  reqOpen.onupgradeneeded = function() {
+    // This happens before |onsuccess| if the database is new or its version is
+    // updated. Create object stores.
+    var db = reqOpen.result;
+    var certStore = db.createObjectStore('certificates', { keyPath: 'id' });
+    certStore.createIndex('by_id', 'id');
+  };
+  reqOpen.onsuccess = function() {
+    if (gDatabase !== null)
+      throw failTest('The database is already open.');
+    gDatabase = reqOpen.result;
+    returnToTest('ok-database-opened');
+  }
+  reqOpen.onerror = function() {
+    throw failTest('The database could not be opened. Error: ' + reqOpen.error);
+  }
+}
+
+function closeDatabase() {
+  if (gDatabase === null)
+    throw failTest('The database is already closed.');
+  gDatabase.close();
+  gDatabase = null;
+  returnToTest('ok-database-closed');
+}
+
+function deleteDatabase() {
+  if (gDatabase !== null)
+    throw failTest('The database should be closed before deleting.');
+  var reqDelete = indexedDB.deleteDatabase(kDatabaseName);
+  reqDelete.onsuccess = function () {
+    returnToTest('ok-database-deleted');
+  };
+  reqDelete.onerror = function () {
+    throw failTest(
+        'The database could not be deleted. Error: ' + reqDelete.error);
+  };
+}
+
+/**
+ * Generates a certificate and clones it by saving and loading it to the
+ * database (requires database to be open, see |openDatabase|). After returning
+ * successfully to the test, the global variables |gCertificate| and
+ * |gCertificateClone| have been set.
+ * @param {!Object} keygenAlgorithm An |AlgorithmIdentifier| to be used as
+ * parameter to |RTCPeerConnection.generateCertificate|. The resulting
+ * certificate will be used by the peer connection.
+ */
+function generateAndCloneCertificate(keygenAlgorithm) {
+  RTCPeerConnection.generateCertificate(keygenAlgorithm).then(
+      function(certificate) {
+        gCertificate = certificate;
+        cloneCertificate(gCertificate,
+            function(clone) {
+              gCertificateClone = clone;
+              // TODO(hbos): Verify that |gCertificate| is value-equal to
+              // |gCertificateClone|. crbug.com/609108
+              returnToTest('ok-generated-and-cloned');
+            },
+            function() {
+              throw failTest('Error cloning certificate.');
+            });
+      },
+      function() {
+        failTest('Certificate generation failed. keygenAlgorithm: ' +
+            JSON.stringify(keygenAlgorithm));
+      });
+}
+
+// Public helper functions to test functions. Expected to indirectly be called
+// with ExecuteJavascript from browser tests, but does not do |returnToTest|.
+
+function saveCertificate(certificate, onsuccess, onerror) {
+  if (gDatabase === null)
+    throw failTest('The database is not open.');
+
+  var certTrans = gDatabase.transaction('certificates', 'readwrite');
+  var certStore = certTrans.objectStore('certificates');
+  var certPut = certStore.put({
+    id:0,
+    cert:certificate
+  });
+
+  certPut.onsuccess = function() {
+    onsuccess();
+  };
+  certPut.onerror = function() {
+    onerror(certPut.error);
+  };
+}
+
+function loadCertificate(onsuccess, onerror) {
+  if (gDatabase === null)
+    throw failTest('The database is not open.');
+
+  var certTrans = gDatabase.transaction('certificates', 'readonly');
+  var certStore = certTrans.objectStore('certificates');
+  var certById = certStore.index('by_id');
+
+  var reqGet = certById.get(0);
+  reqGet.onsuccess = function() {
+    var match = reqGet.result;
+    if (match !== undefined) {
+      onsuccess(match.cert);
+    } else {
+      onsuccess(null);
+    }
+  };
+  reqGet.onerror = function() {
+    onerror(reqGet.error);
+  };
+}
+
+function cloneCertificate(certificate, onsuccess, onerror) {
+  saveCertificate(certificate,
+      function() {
+        // Certificate saved successfully, now load it.
+        loadCertificate(
+            function(clone) {
+              // Load successful.
+              if (clone === null)
+                throw failTest('loadCertificate returned a null certificate.');
+              onsuccess(clone);
+            },
+            onerror);
+      },
+      onerror);
+}