AU: Verify source rootfs/kernel hashes before applying delta.

install_plan.h

 // Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROMEOS_PLATFORM_UPDATE_ENGINE_INSTALL_PLAN_H__
 #define CHROMEOS_PLATFORM_UPDATE_ENGINE_INSTALL_PLAN_H__
 
 #include <string>
+#include <vector>
+
 #include "base/logging.h"
 
 // InstallPlan is a simple struct that contains relevant info for many
 // parts of the update system about the install that should happen.
 
 namespace chromeos_update_engine {
 
 struct InstallPlan {
   InstallPlan(bool is_full,
               bool is_resume,
@@ skipping 11 matching lines @@
         kernel_install_path(kernel_install_path) {}
   InstallPlan() : is_full_update(false), is_resume(false), size(0) {}
 
   bool is_full_update;
   bool is_resume;
   std::string download_url;  // url to download from
   uint64_t size;  // size of the download url's data
   std::string download_hash;  // hash of the data at the url
   std::string install_path;  // path to install device
   std::string kernel_install_path;  // path to kernel install device
+  std::vector<char> current_kernel_hash;  // computed by FileSystemCopierAction
+  std::vector<char> current_rootfs_hash;  // computed by FileSystemCopierAction
 
   bool operator==(const InstallPlan& that) const {
     return (is_full_update == that.is_full_update) &&
         (is_resume == that.is_resume) &&
         (download_url == that.download_url) &&
         (size == that.size) &&
         (download_hash == that.download_hash) &&
         (install_path == that.install_path) &&
         (kernel_install_path == that.kernel_install_path);
   }
   bool operator!=(const InstallPlan& that) const {
     return !((*this) == that);
   }
   void Dump() const {
     LOG(INFO) << "InstallPlan: "
               << (is_full_update ? "full_update" : "delta_update")
               << (is_resume ? ", resume" : ", new_update")
               << ", url: " << download_url
               << ", size: " << size
               << ", hash: " << download_hash
               << ", install_path: " << install_path
               << ", kernel_install_path: " << kernel_install_path;
   }
 };
 
 }  // namespace chromeos_update_engine
 
 #endif  // CHROMEOS_PLATFORM_UPDATE_ENGINE_INSTALL_PLAN_H__