// Copyright 2021 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.

#include "cryptohome/auth_blocks/sync_to_async_auth_block_adapter.h"

#include <atomic>
#include <memory>
#include <string>
#include <utility>
#include <vector>

#include <base/run_loop.h>
#include <base/test/bind.h>
#include <base/test/task_environment.h>
#include <gtest/gtest.h>
#include <libhwsec/error/elliptic_curve_error.h>
#include <libhwsec-foundation/crypto/scrypt.h>
#include <libhwsec-foundation/error/testing_helper.h>

#include "cryptohome/auth_blocks/auth_block_state.h"
#include "cryptohome/auth_blocks/auth_block_utils.h"
#include "cryptohome/auth_blocks/libscrypt_compat_auth_block.h"
#include "cryptohome/auth_blocks/tpm_ecc_auth_block.h"
#include "cryptohome/crypto_error.h"
#include "cryptohome/mock_cryptohome_keys_manager.h"
#include "cryptohome/mock_le_credential_backend.h"
#include "cryptohome/mock_le_credential_manager.h"
#include "cryptohome/mock_tpm.h"

using ::hwsec::TPMError;
using ::hwsec::TPMErrorBase;
using ::hwsec::TPMRetryAction;
using ::hwsec_foundation::error::testing::ReturnError;
using ::testing::_;
using ::testing::DoAll;
using ::testing::Exactly;
using ::testing::NiceMock;
using ::testing::Return;
using ::testing::SaveArg;
using ::testing::SetArgPointee;

namespace cryptohome {

class SyncToAsyncAuthBlockAdapterTest : public ::testing::Test {
 public:
  SyncToAsyncAuthBlockAdapterTest() = default;
  SyncToAsyncAuthBlockAdapterTest(const SyncToAsyncAuthBlockAdapterTest&) =
      delete;
  SyncToAsyncAuthBlockAdapterTest& operator=(
      const SyncToAsyncAuthBlockAdapterTest&) = delete;

  ~SyncToAsyncAuthBlockAdapterTest() override = default;

 protected:
  base::test::TaskEnvironment task_environment_;
};

using AsyncLibScryptCompatAuthBlockTest = SyncToAsyncAuthBlockAdapterTest;

TEST_F(AsyncLibScryptCompatAuthBlockTest, CreateTest) {
  AuthInput auth_input;
  auth_input.user_input = brillo::SecureBlob("foo");

  base::RunLoop run_loop;
  AuthBlock::CreateCallback create_callback = base::BindLambdaForTesting(
      [&](CryptoStatus error, std::unique_ptr<KeyBlobs> blobs,
          std::unique_ptr<AuthBlockState> auth_state) {
        EXPECT_TRUE(error.ok());

        // Because the salt is generated randomly inside the auth block, this
        // test cannot check the exact values returned. The salt() could be
        // passed through in some test specific harness, but the underlying
        // scrypt code is tested in so many other places, it's unnecessary.
        EXPECT_FALSE(blobs->scrypt_key->derived_key().empty());
        EXPECT_FALSE(blobs->scrypt_key->ConsumeSalt().empty());

        EXPECT_FALSE(blobs->chaps_scrypt_key->derived_key().empty());
        EXPECT_FALSE(blobs->chaps_scrypt_key->ConsumeSalt().empty());

        EXPECT_FALSE(
            blobs->scrypt_wrapped_reset_seed_key->derived_key().empty());
        EXPECT_FALSE(
            blobs->scrypt_wrapped_reset_seed_key->ConsumeSalt().empty());
        run_loop.Quit();
      });

  auto scrypt_auth_block = std::make_unique<LibScryptCompatAuthBlock>();
  SyncToAsyncAuthBlockAdapter auth_block(std::move(scrypt_auth_block));
  auth_block.Create(auth_input, std::move(create_callback));

  run_loop.Run();
}

TEST_F(AsyncLibScryptCompatAuthBlockTest, DeriveTest) {
  SerializedVaultKeyset serialized;
  serialized.set_flags(SerializedVaultKeyset::SCRYPT_WRAPPED);

  std::vector<uint8_t> wrapped_keyset = {
      0x73, 0x63, 0x72, 0x79, 0x70, 0x74, 0x00, 0x0E, 0x00, 0x00, 0x00, 0x08,
      0x00, 0x00, 0x00, 0x01, 0x4D, 0xEE, 0xFC, 0x79, 0x0D, 0x79, 0x08, 0x79,
      0xD5, 0xF6, 0x07, 0x65, 0xDF, 0x76, 0x5A, 0xAE, 0xD1, 0xBD, 0x1D, 0xCF,
      0x29, 0xF6, 0xFF, 0x5C, 0x31, 0x30, 0x23, 0xD1, 0x22, 0x17, 0xDF, 0x74,
      0x26, 0xD5, 0x11, 0x88, 0x8D, 0x40, 0xA6, 0x9C, 0xB9, 0x72, 0xCE, 0x37,
      0x71, 0xB7, 0x39, 0x0E, 0x3E, 0x34, 0x0F, 0x73, 0x29, 0xF4, 0x0F, 0x89,
      0x15, 0xF7, 0x6E, 0xA1, 0x5A, 0x29, 0x78, 0x21, 0xB7, 0xC0, 0x76, 0x50,
      0x14, 0x5C, 0xAD, 0x77, 0x53, 0xC9, 0xD0, 0xFE, 0xD1, 0xB9, 0x81, 0x32,
      0x75, 0x0E, 0x1E, 0x45, 0x34, 0xBD, 0x0B, 0xF7, 0xFA, 0xED, 0x9A, 0xD7,
      0x6B, 0xE4, 0x2F, 0xC0, 0x2F, 0x58, 0xBE, 0x3A, 0x26, 0xD1, 0x82, 0x41,
      0x09, 0x82, 0x7F, 0x17, 0xA8, 0x5C, 0x66, 0x0E, 0x24, 0x8B, 0x7B, 0xF5,
      0xEB, 0x0C, 0x6D, 0xAE, 0x19, 0x5C, 0x7D, 0xC4, 0x0D, 0x8D, 0xB2, 0x18,
      0x13, 0xD4, 0xC0, 0x32, 0x34, 0x15, 0xAE, 0x1D, 0xA1, 0x44, 0x2E, 0x80,
      0xD8, 0x00, 0x8A, 0xB9, 0xDD, 0xA4, 0xC0, 0x33, 0xAE, 0x26, 0xD3, 0xE6,
      0x53, 0xD6, 0x31, 0x5C, 0x4C, 0x10, 0xBB, 0xA9, 0xD5, 0x53, 0xD7, 0xAD,
      0xCD, 0x97, 0x20, 0x83, 0xFC, 0x18, 0x4B, 0x7F, 0xC1, 0xBD, 0x85, 0x43,
      0x12, 0x85, 0x4F, 0x6F, 0xAA, 0xDB, 0x58, 0xA0, 0x0F, 0x2C, 0xAB, 0xEA,
      0x74, 0x8E, 0x2C, 0x28, 0x01, 0x88, 0x48, 0xA5, 0x0A, 0xFC, 0x2F, 0xB4,
      0x59, 0x4B, 0xF6, 0xD9, 0xE5, 0x47, 0x94, 0x42, 0xA5, 0x61, 0x06, 0x8C,
      0x5A, 0x9C, 0xD3, 0xA6, 0x30, 0x2C, 0x13, 0xCA, 0xF1, 0xFF, 0xFE, 0x5C,
      0xE8, 0x21, 0x25, 0x9A, 0xE0, 0x50, 0xC3, 0x2F, 0x14, 0x71, 0x38, 0xD0,
      0xE7, 0x79, 0x5D, 0xF0, 0x71, 0x80, 0xF0, 0x3D, 0x05, 0xB6, 0xF7, 0x67,
      0x3F, 0x22, 0x21, 0x7A, 0xED, 0x48, 0xC4, 0x2D, 0xEA, 0x2E, 0xAE, 0xE9,
      0xA8, 0xFF, 0xA0, 0xB6, 0xB4, 0x0A, 0x94, 0x34, 0x40, 0xD1, 0x6C, 0x6C,
      0xC7, 0x90, 0x9C, 0xF7, 0xED, 0x0B, 0xED, 0x90, 0xB1, 0x4D, 0x6D, 0xB4,
      0x3D, 0x04, 0x7E, 0x7B, 0x16, 0x59, 0xFF, 0xFE};

  std::vector<uint8_t> wrapped_chaps_key = {
      0x73, 0x63, 0x72, 0x79, 0x70, 0x74, 0x00, 0x0E, 0x00, 0x00, 0x00, 0x08,
      0x00, 0x00, 0x00, 0x01, 0xC9, 0x80, 0xA1, 0x30, 0x82, 0x40, 0xE6, 0xCF,
      0xC8, 0x59, 0xE9, 0xB6, 0xB0, 0xE8, 0xBF, 0x95, 0x82, 0x79, 0x71, 0xF9,
      0x86, 0x8A, 0xCA, 0x53, 0x23, 0xCF, 0x31, 0xFE, 0x4B, 0xD2, 0xA5, 0x26,
      0xA4, 0x46, 0x3D, 0x35, 0xEF, 0x69, 0x02, 0xC4, 0xBF, 0x72, 0xDC, 0xF8,
      0x90, 0x77, 0xFB, 0x59, 0x0D, 0x41, 0xCB, 0x5B, 0x58, 0xC6, 0x08, 0x0F,
      0x19, 0x4E, 0xC8, 0x4A, 0x57, 0xE7, 0x63, 0x43, 0x39, 0x79, 0xD7, 0x6E,
      0x0D, 0xD0, 0xE4, 0x4F, 0xFA, 0x55, 0x32, 0xE1, 0x6B, 0xE4, 0xFF, 0x12,
      0xB1, 0xA3, 0x75, 0x9C, 0x44, 0x3A, 0x16, 0x68, 0x5C, 0x11, 0xD0, 0xA5,
      0x4C, 0x65, 0xB0, 0xBF, 0x04, 0x41, 0x94, 0xFE, 0xC5, 0xDD, 0x5C, 0x78,
      0x5B, 0x14, 0xA1, 0x3F, 0x0B, 0x17, 0x9C, 0x75, 0xA5, 0x9E, 0x36, 0x14,
      0x5B, 0xC4, 0xAC, 0x77, 0x28, 0xDE, 0xEB, 0xB4, 0x51, 0x5F, 0x33, 0x36};

  std::vector<uint8_t> wrapped_reset_seed = {
      0x73, 0x63, 0x72, 0x79, 0x70, 0x74, 0x00, 0x0E, 0x00, 0x00, 0x00, 0x08,
      0x00, 0x00, 0x00, 0x01, 0x7F, 0x40, 0x30, 0x51, 0x2F, 0x15, 0x62, 0x15,
      0xB1, 0x2E, 0x58, 0x27, 0x52, 0xE4, 0xFF, 0xC5, 0x3C, 0x1E, 0x19, 0x05,
      0x84, 0xD8, 0xE8, 0xD4, 0xFD, 0x8C, 0x33, 0xE8, 0x06, 0x1A, 0x38, 0x28,
      0x2D, 0xD7, 0x01, 0xD2, 0xB3, 0xE1, 0x95, 0xC3, 0x49, 0x63, 0x39, 0xA2,
      0xB2, 0xE3, 0xDA, 0xE2, 0x76, 0x40, 0x40, 0x11, 0xD1, 0x98, 0xD2, 0x03,
      0xFB, 0x60, 0xD0, 0xA1, 0xA5, 0xB5, 0x51, 0xAA, 0xEF, 0x6C, 0xB3, 0xAB,
      0x23, 0x65, 0xCA, 0x44, 0x84, 0x7A, 0x71, 0xCA, 0x0C, 0x36, 0x33, 0x7F,
      0x53, 0x06, 0x0E, 0x03, 0xBB, 0xC1, 0x9A, 0x9D, 0x40, 0x1C, 0x2F, 0x46,
      0xB7, 0x84, 0x00, 0x59, 0x5B, 0xD6, 0x53, 0xE4, 0x51, 0x82, 0xC2, 0x3D,
      0xF4, 0x46, 0xD2, 0xDD, 0xE5, 0x7A, 0x0A, 0xEB, 0xC8, 0x45, 0x7C, 0x37,
      0x01, 0xD5, 0x37, 0x4E, 0xE3, 0xC7, 0xBC, 0xC6, 0x5E, 0x25, 0xFE, 0xE2,
      0x05, 0x14, 0x60, 0x33, 0xB8, 0x1A, 0xF1, 0x17, 0xE1, 0x0C, 0x25, 0x00,
      0xA5, 0x0A, 0xD5, 0x03};

  serialized.set_wrapped_keyset(wrapped_keyset.data(), wrapped_keyset.size());
  serialized.set_wrapped_chaps_key(wrapped_chaps_key.data(),
                                   wrapped_chaps_key.size());
  serialized.set_wrapped_reset_seed(wrapped_reset_seed.data(),
                                    wrapped_reset_seed.size());

  brillo::SecureBlob key = {0x31, 0x35, 0x64, 0x64, 0x38, 0x38, 0x66, 0x36,
                            0x35, 0x31, 0x30, 0x65, 0x30, 0x64, 0x35, 0x64,
                            0x35, 0x35, 0x36, 0x35, 0x35, 0x35, 0x38, 0x36,
                            0x31, 0x32, 0x62, 0x37, 0x39, 0x36, 0x30, 0x65};

  KeyBlobs key_out_data;
  AuthInput auth_input;
  auth_input.user_input = key;

  VaultKeyset vk;
  vk.InitializeFromSerialized(serialized);
  AuthBlockState auth_state;
  EXPECT_TRUE(GetAuthBlockState(vk, auth_state));

  brillo::SecureBlob derived_key = {
      0x58, 0x2A, 0x41, 0x1F, 0xC0, 0x27, 0x2D, 0xC7, 0xF8, 0xEC, 0xA3,
      0x4E, 0xC0, 0x3F, 0x6C, 0x56, 0x6D, 0x88, 0x69, 0x3F, 0x50, 0x20,
      0x37, 0xE3, 0x77, 0x5F, 0xDD, 0xC3, 0x61, 0x2D, 0x27, 0xAD, 0xD3,
      0x55, 0x4D, 0x66, 0xE5, 0x83, 0xD2, 0x5E, 0x02, 0x0C, 0x22, 0x59,
      0x6C, 0x39, 0x35, 0x86, 0xEC, 0x46, 0xB0, 0x85, 0x89, 0xE3, 0x4C,
      0xB9, 0xE2, 0x0C, 0xA1, 0x27, 0x60, 0x85, 0x5A, 0x37};

  brillo::SecureBlob derived_chaps_key = {
      0x16, 0x53, 0xEE, 0x4D, 0x76, 0x47, 0x68, 0x09, 0xB3, 0x39, 0x1D,
      0xD3, 0x6F, 0xA2, 0x8F, 0x8A, 0x3E, 0xB3, 0x64, 0xDD, 0x4D, 0xC4,
      0x64, 0x6F, 0xE1, 0xB8, 0x82, 0x28, 0x68, 0x72, 0x68, 0x84, 0x93,
      0xE2, 0xDB, 0x2F, 0x27, 0x91, 0x08, 0x2C, 0xA0, 0xD9, 0xA1, 0x6E,
      0x6F, 0x0E, 0x13, 0x66, 0x1D, 0x94, 0x12, 0x6F, 0xF4, 0x98, 0x7B,
      0x44, 0x62, 0x57, 0x47, 0x33, 0x46, 0xD2, 0x30, 0x42};

  brillo::SecureBlob derived_reset_seed_key = {
      0xFA, 0x93, 0x57, 0xCE, 0x21, 0xBB, 0x82, 0x4D, 0x3A, 0x3B, 0x26,
      0x88, 0x8C, 0x7E, 0x61, 0x52, 0x52, 0xF0, 0x12, 0x25, 0xA3, 0x59,
      0xCA, 0x71, 0xD2, 0x0C, 0x52, 0x8A, 0x5B, 0x7A, 0x7D, 0xBF, 0x8E,
      0xC7, 0x4D, 0x1D, 0xB5, 0xF9, 0x01, 0xA6, 0xE5, 0x5D, 0x47, 0x2E,
      0xFD, 0x7C, 0x78, 0x1D, 0x9B, 0xAD, 0xE6, 0x71, 0x35, 0x2B, 0x32,
      0x1E, 0x59, 0x19, 0x47, 0x88, 0x92, 0x50, 0x28, 0x09};

  base::RunLoop run_loop;
  AuthBlock::DeriveCallback derive_callback = base::BindLambdaForTesting(
      [&](CryptoStatus error, std::unique_ptr<KeyBlobs> key_out_data) {
        EXPECT_TRUE(error.ok());
        EXPECT_EQ(derived_key, key_out_data->scrypt_key->derived_key());
        EXPECT_EQ(derived_chaps_key,
                  key_out_data->chaps_scrypt_key->derived_key());
        EXPECT_EQ(derived_reset_seed_key,
                  key_out_data->scrypt_wrapped_reset_seed_key->derived_key());
        run_loop.Quit();
      });

  auto scrypt_auth_block = std::make_unique<LibScryptCompatAuthBlock>();
  SyncToAsyncAuthBlockAdapter auth_block(std::move(scrypt_auth_block));
  auth_block.Derive(auth_input, auth_state, std::move(derive_callback));

  run_loop.Run();
}
}  // namespace cryptohome