text: // 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
  
  