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// Copyright 2018 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
////////////////////////////////////////////////////////////////////////////////
#include "tink/daead/deterministic_aead_factory.h"
#include "gtest/gtest.h"
#include "tink/core/key_manager_impl.h"
#include "tink/crypto_format.h"
#include "tink/daead/aes_siv_key_manager.h"
#include "tink/daead/deterministic_aead_config.h"
#include "tink/deterministic_aead.h"
#include "tink/internal/key_info.h"
#include "tink/keyset_handle.h"
#include "tink/util/test_keyset_handle.h"
#include "tink/util/status.h"
#include "tink/util/test_util.h"
#include "proto/aes_siv.pb.h"
using crypto::tink::TestKeysetHandle;
using crypto::tink::test::AddRawKey;
using crypto::tink::test::AddTinkKey;
using google::crypto::tink::AesSivKeyFormat;
using google::crypto::tink::KeyData;
using google::crypto::tink::Keyset;
using google::crypto::tink::KeyStatusType;
namespace crypto {
namespace tink {
namespace {
class DeterministicAeadFactoryTest : public ::testing::Test {};
TEST_F(DeterministicAeadFactoryTest, testBasic) {
Keyset keyset;
auto daead_result = DeterministicAeadFactory::GetPrimitive(
*TestKeysetHandle::GetKeysetHandle(keyset));
EXPECT_FALSE(daead_result.ok());
EXPECT_EQ(util::error::INVALID_ARGUMENT, daead_result.status().error_code());
EXPECT_PRED_FORMAT2(testing::IsSubstring, "at least one key",
daead_result.status().error_message());
}
TEST_F(DeterministicAeadFactoryTest, testPrimitive) {
// Prepare a template for generating keys for a Keyset.
AesSivKeyManager key_type_manager;
auto key_manager =
internal::MakeKeyManager<DeterministicAead>(&key_type_manager);
const KeyFactory& key_factory = key_manager->get_key_factory();
std::string key_type = key_manager->get_key_type();
AesSivKeyFormat key_format;
key_format.set_key_size(64);
// Prepare a Keyset.
Keyset keyset;
uint32_t key_id_1 = 1234543;
auto new_key = std::move(key_factory.NewKey(key_format).ValueOrDie());
AddTinkKey(key_type, key_id_1, *new_key, KeyStatusType::ENABLED,
KeyData::SYMMETRIC, &keyset);
uint32_t key_id_2 = 726329;
new_key = std::move(key_factory.NewKey(key_format).ValueOrDie());
AddRawKey(key_type, key_id_2, *new_key, KeyStatusType::ENABLED,
KeyData::SYMMETRIC, &keyset);
uint32_t key_id_3 = 7213743;
new_key = std::move(key_factory.NewKey(key_format).ValueOrDie());
AddTinkKey(key_type, key_id_3, *new_key, KeyStatusType::ENABLED,
KeyData::SYMMETRIC, &keyset);
keyset.set_primary_key_id(key_id_3);
// Initialize the registry.
ASSERT_TRUE(DeterministicAeadConfig::Register().ok());
// Create a KeysetHandle and use it with the factory.
auto daead_result = DeterministicAeadFactory::GetPrimitive(
*TestKeysetHandle::GetKeysetHandle(keyset));
EXPECT_TRUE(daead_result.ok()) << daead_result.status();
auto daead = std::move(daead_result.ValueOrDie());
// Test the resulting DeterministicAead-instance.
std::string plaintext = "some_plaintext";
std::string aad = "some_aad";
auto encrypt_result = daead->EncryptDeterministically(plaintext, aad);
EXPECT_TRUE(encrypt_result.ok()) << encrypt_result.status();
std::string ciphertext = encrypt_result.ValueOrDie();
std::string prefix =
CryptoFormat::GetOutputPrefix(KeyInfoFromKey(keyset.key(2))).ValueOrDie();
EXPECT_PRED_FORMAT2(testing::IsSubstring, prefix, ciphertext);
auto decrypt_result = daead->DecryptDeterministically(ciphertext, aad);
EXPECT_TRUE(decrypt_result.ok()) << decrypt_result.status();
EXPECT_EQ(plaintext, decrypt_result.ValueOrDie());
decrypt_result = daead->DecryptDeterministically("some bad ciphertext", aad);
EXPECT_FALSE(decrypt_result.ok());
EXPECT_EQ(util::error::INVALID_ARGUMENT,
decrypt_result.status().error_code());
EXPECT_PRED_FORMAT2(testing::IsSubstring, "decryption failed",
decrypt_result.status().error_message());
// Create raw ciphertext with 2nd key, and decrypt
// with DeterministicAead-instance.
auto raw_daead = std::move(
key_manager->GetPrimitive(keyset.key(1).key_data()).ValueOrDie());
std::string raw_ciphertext =
raw_daead->EncryptDeterministically(plaintext, aad).ValueOrDie();
decrypt_result = daead->DecryptDeterministically(ciphertext, aad);
EXPECT_TRUE(decrypt_result.ok()) << decrypt_result.status();
EXPECT_EQ(plaintext, decrypt_result.ValueOrDie());
}
} // namespace
} // namespace tink
} // namespace crypto