1 files changed, 44 insertions, 0 deletions
diff --git a/chromium/chrome/browser/push_messaging/push_messaging_utils.cc b/chromium/chrome/browser/push_messaging/push_messaging_utils.cc
new file mode 100644
index 00000000000..b54bf14acf3
--- /dev/null
+++ b/chromium/chrome/browser/push_messaging/push_messaging_utils.cc
@@ -0,0 +1,44 @@
+// Copyright 2020 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.
+
+#include "chrome/browser/push_messaging/push_messaging_utils.h"
+#include "base/base64url.h"
+#include "chrome/browser/push_messaging/push_messaging_constants.h"
+#include "url/gurl.h"
+
+namespace push_messaging {
+
+GURL CreateEndpoint(const std::string& subscription_id) {
+  const GURL endpoint(kPushMessagingGcmEndpoint + subscription_id);
+  DCHECK(endpoint.is_valid());
+  return endpoint;
+}
+
+blink::mojom::PushSubscriptionOptionsPtr MakeOptions(
+    const std::string& sender_id) {
+  return blink::mojom::PushSubscriptionOptions::New(
+      /*user_visible_only=*/true,
+      std::vector<uint8_t>(sender_id.begin(), sender_id.end()));
+}
+
+bool IsVapidKey(const std::string& application_server_key) {
+  // VAPID keys are NIST P-256 public keys in uncompressed format (64 bytes),
+  // verified through its length and the 0x04 prefix.
+  return application_server_key.size() == 65 &&
+         application_server_key[0] == 0x04;
+}
+
+std::string NormalizeSenderInfo(const std::string& application_server_key) {
+  if (!IsVapidKey(application_server_key))
+    return application_server_key;
+
+  std::string encoded_application_server_key;
+  base::Base64UrlEncode(application_server_key,
+                        base::Base64UrlEncodePolicy::OMIT_PADDING,
+                        &encoded_application_server_key);
+
+  return encoded_application_server_key;
+}
+
+}  // namespace push_messaging