| // Copyright 2020 Google LLC |
| // |
| // 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/prf/aes_cmac_prf_key_manager.h" |
| |
| #include <sstream> |
| #include <string> |
| |
| #include "gmock/gmock.h" |
| #include "gtest/gtest.h" |
| #include "tink/subtle/aes_cmac_boringssl.h" |
| #include "tink/util/istream_input_stream.h" |
| #include "tink/util/status.h" |
| #include "tink/util/statusor.h" |
| #include "tink/util/test_matchers.h" |
| #include "proto/aes_cmac_prf.pb.h" |
| |
| namespace crypto { |
| namespace tink { |
| |
| namespace { |
| |
| using ::crypto::tink::test::IsOk; |
| using ::google::crypto::tink::AesCmacPrfKey; |
| using ::google::crypto::tink::AesCmacPrfKeyFormat; |
| using ::testing::Eq; |
| using ::testing::Not; |
| using ::testing::SizeIs; |
| using ::testing::StrEq; |
| |
| std::unique_ptr<InputStream> GetInputStreamForString(const std::string& input) { |
| return absl::make_unique<util::IstreamInputStream>( |
| absl::make_unique<std::stringstream>(input)); |
| } |
| |
| AesCmacPrfKeyFormat ValidKeyFormat() { |
| AesCmacPrfKeyFormat format; |
| format.set_key_size(32); |
| return format; |
| } |
| |
| TEST(AesCmacPrfKeyManagerTest, Basics) { |
| EXPECT_THAT(AesCmacPrfKeyManager().get_version(), Eq(0)); |
| EXPECT_THAT(AesCmacPrfKeyManager().get_key_type(), |
| Eq("type.googleapis.com/google.crypto.tink.AesCmacPrfKey")); |
| EXPECT_THAT(AesCmacPrfKeyManager().key_material_type(), |
| Eq(google::crypto::tink::KeyData::SYMMETRIC)); |
| } |
| |
| TEST(AesCmacPrfKeyManagerTest, ValidateEmptyKey) { |
| EXPECT_THAT(AesCmacPrfKeyManager().ValidateKey(AesCmacPrfKey()), Not(IsOk())); |
| } |
| |
| TEST(AesCmacPrfKeyManagerTest, ValidateEmptyKeyFormat) { |
| EXPECT_THAT(AesCmacPrfKeyManager().ValidateKeyFormat(AesCmacPrfKeyFormat()), |
| Not(IsOk())); |
| } |
| |
| TEST(AesCmacPrfKeyManagerTest, ValidateSimpleKeyFormat) { |
| EXPECT_THAT(AesCmacPrfKeyManager().ValidateKeyFormat(ValidKeyFormat()), |
| IsOk()); |
| } |
| |
| TEST(AesCmacPrfKeyManagerTest, ValidateKeyFormatKeySizes) { |
| AesCmacPrfKeyFormat format = ValidKeyFormat(); |
| |
| format.set_key_size(0); |
| EXPECT_THAT(AesCmacPrfKeyManager().ValidateKeyFormat(format), Not(IsOk())); |
| |
| format.set_key_size(1); |
| EXPECT_THAT(AesCmacPrfKeyManager().ValidateKeyFormat(format), Not(IsOk())); |
| |
| format.set_key_size(15); |
| EXPECT_THAT(AesCmacPrfKeyManager().ValidateKeyFormat(format), Not(IsOk())); |
| |
| format.set_key_size(16); |
| EXPECT_THAT(AesCmacPrfKeyManager().ValidateKeyFormat(format), Not(IsOk())); |
| |
| format.set_key_size(17); |
| EXPECT_THAT(AesCmacPrfKeyManager().ValidateKeyFormat(format), Not(IsOk())); |
| |
| format.set_key_size(31); |
| EXPECT_THAT(AesCmacPrfKeyManager().ValidateKeyFormat(format), Not(IsOk())); |
| |
| format.set_key_size(32); |
| EXPECT_THAT(AesCmacPrfKeyManager().ValidateKeyFormat(format), IsOk()); |
| |
| format.set_key_size(33); |
| EXPECT_THAT(AesCmacPrfKeyManager().ValidateKeyFormat(format), Not(IsOk())); |
| } |
| |
| TEST(AesCmacPrfKeyManagerTest, CreateKey) { |
| AesCmacPrfKeyFormat format = ValidKeyFormat(); |
| ASSERT_THAT(AesCmacPrfKeyManager().CreateKey(format), IsOk()); |
| AesCmacPrfKey key = AesCmacPrfKeyManager().CreateKey(format).value(); |
| EXPECT_THAT(key.version(), Eq(0)); |
| EXPECT_THAT(key.key_value(), SizeIs(format.key_size())); |
| } |
| |
| TEST(AesCmacPrfKeyManagerTest, ValidateKey) { |
| AesCmacPrfKeyFormat format = ValidKeyFormat(); |
| AesCmacPrfKey key = AesCmacPrfKeyManager().CreateKey(format).value(); |
| EXPECT_THAT(AesCmacPrfKeyManager().ValidateKey(key), IsOk()); |
| } |
| |
| TEST(AesCmacPrfKeyManagerTest, ValidateKeyInvalidVersion) { |
| AesCmacPrfKeyFormat format = ValidKeyFormat(); |
| AesCmacPrfKey key = AesCmacPrfKeyManager().CreateKey(format).value(); |
| key.set_version(1); |
| EXPECT_THAT(AesCmacPrfKeyManager().ValidateKey(key), Not(IsOk())); |
| } |
| |
| TEST(AesCmacPrfKeyManagerTest, ValidateKeyShortKey) { |
| AesCmacPrfKeyFormat format = ValidKeyFormat(); |
| AesCmacPrfKey key = AesCmacPrfKeyManager().CreateKey(format).value(); |
| key.set_key_value("0123456789abcdef"); |
| EXPECT_THAT(AesCmacPrfKeyManager().ValidateKey(key), Not(IsOk())); |
| } |
| |
| TEST(AesCmacPrfKeyManagerTest, GetPrimitive) { |
| AesCmacPrfKeyFormat format = ValidKeyFormat(); |
| AesCmacPrfKey key = AesCmacPrfKeyManager().CreateKey(format).value(); |
| auto manager_prf_or = AesCmacPrfKeyManager().GetPrimitive<Prf>(key); |
| ASSERT_THAT(manager_prf_or, IsOk()); |
| auto prf_value_or = manager_prf_or.value()->Compute("some plaintext", 16); |
| ASSERT_THAT(prf_value_or, IsOk()); |
| |
| auto direct_prf_or = subtle::AesCmacBoringSsl::New( |
| util::SecretDataFromStringView(key.key_value()), 16); |
| ASSERT_THAT(direct_prf_or, IsOk()); |
| auto direct_prf_value_or = |
| direct_prf_or.value()->ComputeMac("some plaintext"); |
| ASSERT_THAT(direct_prf_value_or, IsOk()); |
| EXPECT_THAT(direct_prf_value_or.value(), StrEq(prf_value_or.value())); |
| } |
| |
| TEST(AesCmacPrfKeyManagerTest, DeriveKeyValid) { |
| std::string bytes = "0123456789abcdef0123456789abcdef"; |
| auto inputstream = GetInputStreamForString(bytes); |
| auto key_or = |
| AesCmacPrfKeyManager().DeriveKey(ValidKeyFormat(), inputstream.get()); |
| ASSERT_THAT(key_or, IsOk()); |
| AesCmacPrfKey key = key_or.value(); |
| EXPECT_THAT(key.version(), Eq(AesCmacPrfKeyManager().get_version())); |
| EXPECT_THAT(key.key_value(), Eq(bytes)); |
| } |
| |
| TEST(AesCmacPrfKeyManagerTest, DeriveKeyNotEnoughRandomness) { |
| std::string bytes = "0123456789abcdef"; |
| auto inputstream = GetInputStreamForString(bytes); |
| auto key_or = |
| AesCmacPrfKeyManager().DeriveKey(ValidKeyFormat(), inputstream.get()); |
| EXPECT_THAT(key_or, Not(IsOk())); |
| } |
| |
| TEST(AesCmacPrfKeyManagerTest, DeriveKeyInvalidFormat) { |
| std::string bytes = "0123456789abcdef"; |
| auto inputstream = GetInputStreamForString(bytes); |
| auto format = ValidKeyFormat(); |
| format.set_key_size(12); |
| auto key_or = AesCmacPrfKeyManager().DeriveKey(format, inputstream.get()); |
| EXPECT_THAT(key_or, Not(IsOk())); |
| } |
| |
| TEST(AesCmacPrfKeyManagerTest, DeriveKeyInvalidVersion) { |
| auto format = ValidKeyFormat(); |
| format.set_version(1); |
| std::string bytes = "0123456789abcdef0123456789abcdef"; |
| auto inputstream = GetInputStreamForString(bytes); |
| auto key_or = |
| AesCmacPrfKeyManager().DeriveKey(format, inputstream.get()); |
| EXPECT_THAT(key_or, Not(IsOk())); |
| } |
| |
| } // namespace |
| } // namespace tink |
| } // namespace crypto |