This adds support for encrypted ONC import

crypto/symmetric_key_win.cc

 // Copyright (c) 2011 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 "crypto/symmetric_key.h"
 
 #include <winsock2.h>  // For htonl.
 
 #include <vector>
 
@@ skipping 477 matching lines @@
     return NULL;
 
   ScopedHCRYPTKEY key;
   if (!ImportRawKey(provider, alg, raw_key.data(), raw_key.size(), &key))
     return NULL;
 
   return new SymmetricKey(provider.release(), key.release(),
                           raw_key.data(), raw_key.size());
 }
 
-bool SymmetricKey::GetRawKey(std::string* raw_key) {
+bool SymmetricKey::GetRawKey(std::string* raw_key) const {
   // Short circuit for when the key was supplied to the constructor.
   if (!raw_key_.empty()) {
     *raw_key = raw_key_;
     return true;
   }
 
   DWORD size = 0;
   BOOL ok = CryptExportKey(key_, 0, PLAINTEXTKEYBLOB, 0, NULL, &size);
   if (!ok)
     return false;
@@ skipping 18 matching lines @@
                            HCRYPTKEY key,
                            const void* key_data, size_t key_size_in_bytes)
     : provider_(provider), key_(key) {
   if (key_data) {
     raw_key_.assign(reinterpret_cast<const char*>(key_data),
                     key_size_in_bytes);
   }
 }
 
 }  // namespace crypto