Validate hash_sha256 checksum on .crx update.

chrome/browser/extensions/sandboxed_unpacker_unittest.cc

 // Copyright (c) 2012 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 "base/bind.h"
+#include "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/message_loop/message_loop.h"
 #include "base/path_service.h"
 #include "base/run_loop.h"
 #include "base/strings/string_util.h"
 #include "base/values.h"
 #include "chrome/browser/extensions/sandboxed_unpacker.h"
 #include "chrome/common/chrome_paths.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "content/public/test/test_utils.h"
 #include "extensions/common/constants.h"
 #include "extensions/common/extension.h"
+#include "extensions/common/switches.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 
 namespace extensions {
 
 class MockSandboxedUnpackerClient : public SandboxedUnpackerClient {
  public:
 
   void WaitForUnpack() {
     scoped_refptr<content::MessageLoopRunner> runner =
         new content::MessageLoopRunner;
     quit_closure_ = runner->QuitClosure();
     runner->Run();
   }
 
   base::FilePath temp_dir() const { return temp_dir_; }
+  base::string16 unpack_err() const { return error_; }
 
  private:
   ~MockSandboxedUnpackerClient() override {}
 
   void OnUnpackSuccess(const base::FilePath& temp_dir,
                        const base::FilePath& extension_root,
                        const base::DictionaryValue* original_manifest,
                        const Extension* extension,
                        const SkBitmap& install_icon) override {
     temp_dir_ = temp_dir;
     quit_closure_.Run();
-
   }
 
   void OnUnpackFailure(const base::string16& error) override {
-    ASSERT_TRUE(false);
+    error_ = error;
+    quit_closure_.Run();
   }
 
+  base::string16 error_;
   base::Closure quit_closure_;
   base::FilePath temp_dir_;
 };
 
 class SandboxedUnpackerTest : public testing::Test {
  public:
   void SetUp() override {
    ASSERT_TRUE(extensions_dir_.CreateUniqueTempDir());
     browser_threads_.reset(new content::TestBrowserThreadBundle(
         content::TestBrowserThreadBundle::IO_MAINLOOP));
     in_process_utility_thread_helper_.reset(
         new content::InProcessUtilityThreadHelper);
     // It will delete itself.
     client_ = new MockSandboxedUnpackerClient;
   }
 
   void TearDown() override {
     // Need to destruct SandboxedUnpacker before the message loop since
     // it posts a task to it.
     sandboxed_unpacker_ = NULL;
     base::RunLoop().RunUntilIdle();
   }
 
-  void SetupUnpacker(const std::string& crx_name) {
+  void SetupUnpacker(const std::string& crx_name,
+                     const std::string& package_hash) {
     base::FilePath original_path;
     ASSERT_TRUE(PathService::Get(chrome::DIR_TEST_DATA, &original_path));
     original_path = original_path.AppendASCII("extensions")
         .AppendASCII("unpacker")
         .AppendASCII(crx_name);
     ASSERT_TRUE(base::PathExists(original_path)) << original_path.value();
 
     sandboxed_unpacker_ = new SandboxedUnpacker(
-        original_path,
-        Manifest::INTERNAL,
-        Extension::NO_FLAGS,
-        extensions_dir_.path(),
-        base::MessageLoopProxy::current(),
-        client_);
+        original_path, package_hash, Manifest::INTERNAL, Extension::NO_FLAGS,
+        extensions_dir_.path(), base::MessageLoopProxy::current(), client_);
 
     base::MessageLoopProxy::current()->PostTask(
         FROM_HERE,
         base::Bind(&SandboxedUnpacker::Start, sandboxed_unpacker_.get()));
     client_->WaitForUnpack();
   }
 
   base::FilePath GetInstallPath() {
     return client_->temp_dir().AppendASCII(kTempExtensionName);
   }
 
+  base::string16 GetInstallError() {
+    return client_->unpack_err();
+  }
+
  protected:
   base::ScopedTempDir extensions_dir_;
   MockSandboxedUnpackerClient* client_;
   scoped_refptr<SandboxedUnpacker> sandboxed_unpacker_;
   scoped_ptr<content::TestBrowserThreadBundle> browser_threads_;
   scoped_ptr<content::InProcessUtilityThreadHelper>
       in_process_utility_thread_helper_;
 };
 
 TEST_F(SandboxedUnpackerTest, NoCatalogsSuccess) {
-  SetupUnpacker("no_l10n.crx");
+  SetupUnpacker("no_l10n.crx", "");
   // Check that there is no _locales folder.
   base::FilePath install_path =
       GetInstallPath().Append(kLocaleFolder);
   EXPECT_FALSE(base::PathExists(install_path));
 }
 
 TEST_F(SandboxedUnpackerTest, WithCatalogsSuccess) {
-  SetupUnpacker("good_l10n.crx");
+  SetupUnpacker("good_l10n.crx", "");
   // Check that there is _locales folder.
   base::FilePath install_path =
       GetInstallPath().Append(kLocaleFolder);
   EXPECT_TRUE(base::PathExists(install_path));
 }
 
+TEST_F(SandboxedUnpackerTest, FailHashCheck) {
+  base::CommandLine::ForCurrentProcess()->AppendSwitch(
+      extensions::switches::kEnableCrxHashCheck);
+  SetupUnpacker("good_l10n.crx", "badhash");
+  // Check that there is an error message.
+  EXPECT_NE(base::string16(), GetInstallError());
+}
+
+TEST_F(SandboxedUnpackerTest, PassHashCheck) {
+  base::CommandLine::ForCurrentProcess()->AppendSwitch(
+      extensions::switches::kEnableCrxHashCheck);
+  SetupUnpacker("good_l10n.crx",
+      "6fa171c726373785aa4fcd2df448c3db0420a95d5044fbee831f089b979c4068");
+  // Check that there is no error message.
+  EXPECT_EQ(base::string16(), GetInstallError());
+}
+
+TEST_F(SandboxedUnpackerTest, SkipHashCheck) {
+  SetupUnpacker("good_l10n.crx", "badhash");
+  // Check that there is no error message.
+  EXPECT_EQ(base::string16(), GetInstallError());
+}
+
 }  // namespace extensions