Require manifests for native messaging hosts.

chrome/browser/extensions/api/messaging/native_process_launcher_win.cc

Index: chrome/browser/extensions/api/messaging/native_process_launcher_win.cc
diff --git a/chrome/browser/extensions/api/messaging/native_process_launcher_win.cc b/chrome/browser/extensions/api/messaging/native_process_launcher_win.cc
index 2b12eb17ec58d627b4f9e31f53e292098c99f3bb..382f482e638d64bd2454351301bf9d1e68434153 100644
--- a/chrome/browser/extensions/api/messaging/native_process_launcher_win.cc
+++ b/chrome/browser/extensions/api/messaging/native_process_launcher_win.cc
@@ -9,14 +9,59 @@
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/process_util.h"
+#include "base/string16.h"
 #include "base/stringprintf.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/utf_string_conversions.h"
+#include "base/win/registry.h"
 #include "base/win/scoped_handle.h"
 #include "crypto/random.h"
+#include "chrome/browser/extensions/api/messaging/native_messaging_host_manifest.h"
 
 namespace extensions {
 
+const wchar_t kNativeMessagingRegistryKey[] =
+    L"SOFTWARE\\Google\\Chrome\\NativeMessagingHosts";
+
+// static
+scoped_ptr<NativeMessagingHostManifest>
+NativeProcessLauncher::FindAndLoadManifest(
+    const std::string& native_host_name,
+    std::string* error_message) {
+  base::win::RegKey key;
+
+  string16 manifest_path;
+  string16 native_host_name_wide = UTF8ToUTF16(native_host_name);
+
+  bool found = false;
+
+  // First check 32-bit registry and then try 64-bit.
+  if (key.Open(HKEY_LOCAL_MACHINE, kNativeMessagingRegistryKey,
+               KEY_QUERY_VALUE | KEY_WOW64_32KEY) == ERROR_SUCCESS) {
+    if (key.ReadValue(native_host_name_wide.c_str(), &manifest_path) ==
+        ERROR_SUCCESS) {
+      found = true;
+    }
+  }
+
+  if (!found && key.Open(HKEY_LOCAL_MACHINE, kNativeMessagingRegistryKey,
+                         KEY_QUERY_VALUE | KEY_WOW64_64KEY) == ERROR_SUCCESS) {
+    if (key.ReadValue(native_host_name_wide.c_str(), &manifest_path) ==
+        ERROR_SUCCESS) {
+      found = true;
+    }
+  }
+
+  if (!found) {
+    *error_message = "Native messaging host " + native_host_name +
+        " is not registered";
+    return scoped_ptr<NativeMessagingHostManifest>();
+  }
+
+  return NativeMessagingHostManifest::Load(
+      base::FilePath(manifest_path), error_message);
+}
+
 // static
 bool NativeProcessLauncher::LaunchNativeProcess(
     const base::FilePath& path,