Update from chromium 62675d9fb31fb8cedc40f68e78e8445a74f362e7

sandbox/linux/suid/client/setuid_sandbox_client_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/environment.h"
+#include "base/logging.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/strings/string_number_conversions.h"
+#include "sandbox/linux/suid/client/setuid_sandbox_client.h"
+#include "sandbox/linux/suid/common/sandbox.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace sandbox {
+
+TEST(SetuidSandboxClient, SetupLaunchEnvironment) {
+  const char kTestValue[] = "This is a test";
+  scoped_ptr<base::Environment> env(base::Environment::Create());
+  EXPECT_TRUE(env != NULL);
+
+  std::string saved_ld_preload;
+  bool environment_had_ld_preload;
+  // First, back-up the real LD_PRELOAD if any.
+  environment_had_ld_preload = env->GetVar("LD_PRELOAD", &saved_ld_preload);
+  // Setup environment variables to save or not save.
+  EXPECT_TRUE(env->SetVar("LD_PRELOAD", kTestValue));
+  EXPECT_TRUE(env->UnSetVar("LD_ORIGIN_PATH"));
+
+  scoped_ptr<SetuidSandboxClient>
+      sandbox_client(SetuidSandboxClient::Create());
+  EXPECT_TRUE(sandbox_client != NULL);
+
+  // Make sure the environment is clean.
+  EXPECT_TRUE(env->UnSetVar(kSandboxEnvironmentApiRequest));
+  EXPECT_TRUE(env->UnSetVar(kSandboxEnvironmentApiProvides));
+
+  sandbox_client->SetupLaunchEnvironment();
+
+  // Check if the requested API environment was set.
+  std::string api_request;
+  EXPECT_TRUE(env->GetVar(kSandboxEnvironmentApiRequest, &api_request));
+  int api_request_num;
+  EXPECT_TRUE(base::StringToInt(api_request, &api_request_num));
+  EXPECT_EQ(api_request_num, kSUIDSandboxApiNumber);
+
+  // Now check if LD_PRELOAD was saved to SANDBOX_LD_PRELOAD.
+  std::string sandbox_ld_preload;
+  EXPECT_TRUE(env->GetVar("SANDBOX_LD_PRELOAD", &sandbox_ld_preload));
+  EXPECT_EQ(sandbox_ld_preload, kTestValue);
+
+  // Check that LD_ORIGIN_PATH was not saved.
+  EXPECT_FALSE(env->HasVar("SANDBOX_LD_ORIGIN_PATH"));
+
+  // We should not forget to restore LD_PRELOAD at the end, or this environment
+  // variable will affect the next running tests!
+  if (environment_had_ld_preload) {
+    EXPECT_TRUE(env->SetVar("LD_PRELOAD", saved_ld_preload));
+  } else {
+    EXPECT_TRUE(env->UnSetVar("LD_PRELOAD"));
+  }
+}
+
+TEST(SetuidSandboxClient, SandboxedClientAPI) {
+  scoped_ptr<base::Environment> env(base::Environment::Create());
+  EXPECT_TRUE(env != NULL);
+
+  scoped_ptr<SetuidSandboxClient>
+      sandbox_client(SetuidSandboxClient::Create());
+  EXPECT_TRUE(sandbox_client != NULL);
+
+  // Set-up a fake environment as if we went through the setuid sandbox.
+  EXPECT_TRUE(env->SetVar(kSandboxEnvironmentApiProvides,
+              base::IntToString(kSUIDSandboxApiNumber)));
+  EXPECT_TRUE(env->SetVar(kSandboxDescriptorEnvironmentVarName, "1"));
+  EXPECT_TRUE(env->SetVar(kSandboxPIDNSEnvironmentVarName, "1"));
+  EXPECT_TRUE(env->UnSetVar(kSandboxNETNSEnvironmentVarName));
+
+  // Check the API.
+  EXPECT_TRUE(sandbox_client->IsSuidSandboxUpToDate());
+  EXPECT_TRUE(sandbox_client->IsSuidSandboxChild());
+  EXPECT_TRUE(sandbox_client->IsInNewPIDNamespace());
+  EXPECT_FALSE(sandbox_client->IsInNewNETNamespace());
+
+  // Forge an incorrect API version and check.
+  EXPECT_TRUE(env->SetVar(kSandboxEnvironmentApiProvides,
+              base::IntToString(kSUIDSandboxApiNumber + 1)));
+  EXPECT_FALSE(sandbox_client->IsSuidSandboxUpToDate());
+  // We didn't go through the actual sandboxing mechanism as it is
+  // very hard in a unit test.
+  EXPECT_FALSE(sandbox_client->IsSandboxed());
+}
+
+// This test doesn't accomplish much, but will make sure that analysis tools
+// will run this codepath.
+TEST(SetuidSandboxClient, GetSandboxBinaryPath) {
+  scoped_ptr<SetuidSandboxClient> setuid_sandbox_client(
+      SetuidSandboxClient::Create());
+  ignore_result(setuid_sandbox_client->GetSandboxBinaryPath());
+}
+
+}  // namespace sandbox
+