| // Copyright 2017 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/mac/hmac_key_manager.h" |
| |
| #include <memory> |
| #include <sstream> |
| #include <string> |
| |
| #include "gmock/gmock.h" |
| #include "gtest/gtest.h" |
| #include "absl/status/status.h" |
| #include "tink/chunked_mac.h" |
| #include "tink/core/key_manager_impl.h" |
| #include "tink/mac.h" |
| #include "tink/util/istream_input_stream.h" |
| #include "tink/util/secret_data.h" |
| #include "tink/util/status.h" |
| #include "tink/util/statusor.h" |
| #include "tink/util/test_matchers.h" |
| #include "proto/hmac.pb.h" |
| |
| namespace crypto { |
| namespace tink { |
| |
| using ::crypto::tink::test::IsOk; |
| using ::crypto::tink::test::StatusIs; |
| using ::crypto::tink::util::IstreamInputStream; |
| using ::crypto::tink::util::StatusOr; |
| using ::google::crypto::tink::HashType; |
| using ::google::crypto::tink::HmacKey; |
| using ::google::crypto::tink::HmacKeyFormat; |
| using ::testing::Eq; |
| using ::testing::HasSubstr; |
| using ::testing::Not; |
| using ::testing::SizeIs; |
| |
| namespace { |
| |
| TEST(HmacKeyManagerTest, Basics) { |
| EXPECT_EQ(HmacKeyManager().get_version(), 0); |
| EXPECT_EQ(HmacKeyManager().get_key_type(), |
| "type.googleapis.com/google.crypto.tink.HmacKey"); |
| EXPECT_EQ(HmacKeyManager().key_material_type(), |
| google::crypto::tink::KeyData::SYMMETRIC); |
| } |
| |
| TEST(HmacKeyManagerTest, ValidateEmptyKey) { |
| EXPECT_THAT(HmacKeyManager().ValidateKey(HmacKey()), Not(IsOk())); |
| } |
| |
| TEST(HmacKeyManagerTest, ValidateEmptyKeyFormat) { |
| EXPECT_THAT(HmacKeyManager().ValidateKeyFormat(HmacKeyFormat()), Not(IsOk())); |
| } |
| |
| TEST(HmacKeyManagerTest, ValidKeyFormat) { |
| HmacKeyFormat key_format; |
| key_format.mutable_params()->set_tag_size(16); |
| key_format.mutable_params()->set_hash(HashType::SHA256); |
| key_format.set_key_size(16); |
| EXPECT_THAT(HmacKeyManager().ValidateKeyFormat(key_format), IsOk()); |
| } |
| |
| TEST(HmacKeyManagerTest, ValidateKeyFormatSmallTagSizes) { |
| for (int i = 0; i < 10; ++i) { |
| HmacKeyFormat key_format; |
| key_format.mutable_params()->set_tag_size(i); |
| key_format.mutable_params()->set_hash(HashType::SHA256); |
| key_format.set_key_size(16); |
| EXPECT_THAT(HmacKeyManager().ValidateKeyFormat(key_format), Not(IsOk())) |
| << " for length " << i; |
| } |
| } |
| |
| TEST(HmacKeyManagerTest, ValidateKeyFormatTagSizesSha1) { |
| HmacKeyFormat key_format; |
| key_format.mutable_params()->set_hash(HashType::SHA1); |
| key_format.set_key_size(16); |
| |
| key_format.mutable_params()->set_tag_size(20); |
| EXPECT_THAT(HmacKeyManager().ValidateKeyFormat(key_format), IsOk()); |
| key_format.mutable_params()->set_tag_size(21); |
| EXPECT_THAT(HmacKeyManager().ValidateKeyFormat(key_format), Not(IsOk())); |
| } |
| |
| TEST(HmacKeyManagerTest, ValidateKeyFormatTagSizesSha224) { |
| HmacKeyFormat key_format; |
| key_format.mutable_params()->set_hash(HashType::SHA224); |
| key_format.set_key_size(16); |
| |
| key_format.mutable_params()->set_tag_size(28); |
| EXPECT_THAT(HmacKeyManager().ValidateKeyFormat(key_format), IsOk()); |
| key_format.mutable_params()->set_tag_size(29); |
| EXPECT_THAT(HmacKeyManager().ValidateKeyFormat(key_format), Not(IsOk())); |
| } |
| |
| TEST(HmacKeyManagerTest, ValidateKeyFormatTagSizesSha256) { |
| HmacKeyFormat key_format; |
| key_format.mutable_params()->set_hash(HashType::SHA256); |
| key_format.set_key_size(16); |
| |
| key_format.mutable_params()->set_tag_size(32); |
| EXPECT_THAT(HmacKeyManager().ValidateKeyFormat(key_format), IsOk()); |
| key_format.mutable_params()->set_tag_size(33); |
| EXPECT_THAT(HmacKeyManager().ValidateKeyFormat(key_format), Not(IsOk())); |
| } |
| |
| TEST(HmacKeyManagerTest, ValidateKeyFormatTagSizesSha384) { |
| HmacKeyFormat key_format; |
| key_format.mutable_params()->set_hash(HashType::SHA384); |
| key_format.set_key_size(16); |
| |
| key_format.mutable_params()->set_tag_size(48); |
| EXPECT_THAT(HmacKeyManager().ValidateKeyFormat(key_format), IsOk()); |
| key_format.mutable_params()->set_tag_size(49); |
| EXPECT_THAT(HmacKeyManager().ValidateKeyFormat(key_format), Not(IsOk())); |
| } |
| |
| TEST(HmacKeyManagerTest, ValidateKeyFormatTagSizesSha512) { |
| HmacKeyFormat key_format; |
| key_format.mutable_params()->set_hash(HashType::SHA512); |
| key_format.set_key_size(16); |
| |
| key_format.mutable_params()->set_tag_size(64); |
| EXPECT_THAT(HmacKeyManager().ValidateKeyFormat(key_format), IsOk()); |
| key_format.mutable_params()->set_tag_size(65); |
| EXPECT_THAT(HmacKeyManager().ValidateKeyFormat(key_format), Not(IsOk())); |
| } |
| |
| TEST(HmacKeyManagerTest, ValidateKeyFormatKeySizes) { |
| HmacKeyFormat key_format; |
| key_format.mutable_params()->set_hash(HashType::SHA512); |
| key_format.mutable_params()->set_tag_size(64); |
| |
| key_format.set_key_size(15); |
| EXPECT_THAT(HmacKeyManager().ValidateKeyFormat(key_format), Not(IsOk())); |
| |
| key_format.set_key_size(16); |
| EXPECT_THAT(HmacKeyManager().ValidateKeyFormat(key_format), IsOk()); |
| } |
| |
| TEST(HmacKeyManagerTest, CreateKey) { |
| HmacKeyFormat key_format; |
| key_format.set_key_size(16); |
| key_format.mutable_params()->set_tag_size(10); |
| key_format.mutable_params()->set_hash(HashType::SHA512); |
| auto hmac_key_or = HmacKeyManager().CreateKey(key_format); |
| ASSERT_THAT(hmac_key_or, IsOk()); |
| EXPECT_EQ(hmac_key_or.value().version(), 0); |
| EXPECT_EQ(hmac_key_or.value().params().hash(), key_format.params().hash()); |
| EXPECT_EQ(hmac_key_or.value().params().tag_size(), |
| key_format.params().tag_size()); |
| EXPECT_THAT(hmac_key_or.value().key_value(), SizeIs(key_format.key_size())); |
| |
| EXPECT_THAT(HmacKeyManager().ValidateKey(hmac_key_or.value()), IsOk()); |
| } |
| |
| TEST(HmacKeyManagerTest, ValidKey) { |
| HmacKey key; |
| key.set_version(0); |
| |
| key.mutable_params()->set_hash(HashType::SHA256); |
| key.mutable_params()->set_tag_size(10); |
| key.set_key_value("0123456789abcdef"); |
| |
| EXPECT_THAT(HmacKeyManager().ValidateKey(key), IsOk()); |
| } |
| |
| TEST(HmacKeyManagerTest, ValidateKeyTagSizesSha1) { |
| HmacKey key; |
| key.set_version(0); |
| key.mutable_params()->set_hash(HashType::SHA1); |
| key.set_key_value("0123456789abcdef"); |
| |
| key.mutable_params()->set_tag_size(20); |
| EXPECT_THAT(HmacKeyManager().ValidateKey(key), IsOk()); |
| key.mutable_params()->set_tag_size(21); |
| EXPECT_THAT(HmacKeyManager().ValidateKey(key), Not(IsOk())); |
| } |
| |
| TEST(HmacKeyManagerTest, ValidateKeyTagSizesSha224) { |
| HmacKey key; |
| key.set_version(0); |
| key.mutable_params()->set_hash(HashType::SHA224); |
| key.set_key_value("0123456789abcdef"); |
| |
| key.mutable_params()->set_tag_size(28); |
| EXPECT_THAT(HmacKeyManager().ValidateKey(key), IsOk()); |
| key.mutable_params()->set_tag_size(29); |
| EXPECT_THAT(HmacKeyManager().ValidateKey(key), Not(IsOk())); |
| } |
| |
| TEST(HmacKeyManagerTest, ValidateKeyTagSizesSha256) { |
| HmacKey key; |
| key.set_version(0); |
| key.mutable_params()->set_hash(HashType::SHA256); |
| key.set_key_value("0123456789abcdef"); |
| |
| key.mutable_params()->set_tag_size(32); |
| EXPECT_THAT(HmacKeyManager().ValidateKey(key), IsOk()); |
| key.mutable_params()->set_tag_size(33); |
| EXPECT_THAT(HmacKeyManager().ValidateKey(key), Not(IsOk())); |
| } |
| |
| TEST(HmacKeyManagerTest, ValidateKeyTagSizesSha384) { |
| HmacKey key; |
| key.set_version(0); |
| key.mutable_params()->set_hash(HashType::SHA384); |
| key.set_key_value("0123456789abcdef"); |
| |
| key.mutable_params()->set_tag_size(48); |
| EXPECT_THAT(HmacKeyManager().ValidateKey(key), IsOk()); |
| key.mutable_params()->set_tag_size(49); |
| EXPECT_THAT(HmacKeyManager().ValidateKey(key), Not(IsOk())); |
| } |
| |
| TEST(HmacKeyManagerTest, ValidateKeyTagSizesSha512) { |
| HmacKey key; |
| key.set_version(0); |
| key.mutable_params()->set_hash(HashType::SHA512); |
| key.set_key_value("0123456789abcdef"); |
| |
| key.mutable_params()->set_tag_size(64); |
| EXPECT_THAT(HmacKeyManager().ValidateKey(key), IsOk()); |
| key.mutable_params()->set_tag_size(65); |
| EXPECT_THAT(HmacKeyManager().ValidateKey(key), Not(IsOk())); |
| } |
| |
| TEST(HmacKeyManagerTest, ValidateKeyShortKey) { |
| HmacKey key; |
| key.set_version(0); |
| |
| key.mutable_params()->set_hash(HashType::SHA256); |
| key.mutable_params()->set_tag_size(10); |
| key.set_key_value("0123456789abcde"); |
| |
| EXPECT_THAT(HmacKeyManager().ValidateKey(key), Not(IsOk())); |
| } |
| |
| TEST(HmacKeyManagerTest, DeriveKey) { |
| HmacKeyFormat format; |
| format.set_key_size(23); |
| format.set_version(0); |
| format.mutable_params()->set_hash(HashType::SHA256); |
| format.mutable_params()->set_tag_size(10); |
| |
| IstreamInputStream input_stream{ |
| absl::make_unique<std::stringstream>("0123456789abcdefghijklmnop")}; |
| |
| StatusOr<HmacKey> key_or = HmacKeyManager().DeriveKey(format, &input_stream); |
| ASSERT_THAT(key_or, IsOk()); |
| EXPECT_EQ(key_or.value().key_value(), "0123456789abcdefghijklm"); |
| EXPECT_EQ(key_or.value().params().hash(), format.params().hash()); |
| EXPECT_EQ(key_or.value().params().tag_size(), format.params().tag_size()); |
| } |
| |
| TEST(HmacKeyManagerTest, DeriveKeyNotEnoughRandomness) { |
| HmacKeyFormat format; |
| format.set_key_size(17); |
| format.set_version(0); |
| format.mutable_params()->set_hash(HashType::SHA256); |
| format.mutable_params()->set_tag_size(10); |
| |
| IstreamInputStream input_stream{ |
| absl::make_unique<std::stringstream>("0123456789abcdef")}; |
| |
| ASSERT_THAT(HmacKeyManager().DeriveKey(format, &input_stream).status(), |
| StatusIs(absl::StatusCode::kInvalidArgument)); |
| } |
| |
| TEST(HmacKeyManagerTest, DeriveKeyWrongVersion) { |
| HmacKeyFormat format; |
| format.set_key_size(16); |
| format.set_version(1); |
| format.mutable_params()->set_hash(HashType::SHA256); |
| format.mutable_params()->set_tag_size(10); |
| |
| IstreamInputStream input_stream{ |
| absl::make_unique<std::stringstream>("0123456789abcdef")}; |
| |
| ASSERT_THAT( |
| HmacKeyManager().DeriveKey(format, &input_stream).status(), |
| StatusIs(absl::StatusCode::kInvalidArgument, HasSubstr("version"))); |
| } |
| |
| TEST(HmacKeyManagerTest, GetMacPrimitive) { |
| HmacKeyFormat key_format; |
| key_format.mutable_params()->set_tag_size(16); |
| key_format.mutable_params()->set_hash(HashType::SHA256); |
| key_format.set_key_size(16); |
| HmacKey key = HmacKeyManager().CreateKey(key_format).value(); |
| auto manager_mac_or = HmacKeyManager().GetPrimitive<Mac>(key); |
| ASSERT_THAT(manager_mac_or, IsOk()); |
| auto mac_value_or = manager_mac_or.value()->ComputeMac("some plaintext"); |
| ASSERT_THAT(mac_value_or, IsOk()); |
| |
| auto direct_mac_or = subtle::HmacBoringSsl::New( |
| util::Enums::ProtoToSubtle(key.params().hash()), key.params().tag_size(), |
| util::SecretDataFromStringView(key.key_value())); |
| ASSERT_THAT(direct_mac_or, IsOk()); |
| EXPECT_THAT( |
| direct_mac_or.value()->VerifyMac(mac_value_or.value(), "some plaintext"), |
| IsOk()); |
| } |
| |
| TEST(HmacKeyManagerTest, GetChunkedMacPrimitive) { |
| HmacKeyFormat key_format; |
| key_format.mutable_params()->set_tag_size(16); |
| key_format.mutable_params()->set_hash(HashType::SHA256); |
| key_format.set_key_size(16); |
| HmacKey key = HmacKeyManager().CreateKey(key_format).value(); |
| |
| util::StatusOr<std::unique_ptr<ChunkedMac>> chunked_mac = |
| HmacKeyManager().GetPrimitive<ChunkedMac>(key); |
| ASSERT_THAT(chunked_mac, IsOk()); |
| |
| util::StatusOr<std::unique_ptr<ChunkedMacComputation>> computation = |
| (*chunked_mac)->CreateComputation(); |
| ASSERT_THAT(computation, IsOk()); |
| ASSERT_THAT((*computation)->Update("abc"), IsOk()); |
| ASSERT_THAT((*computation)->Update("xyz"), IsOk()); |
| util::StatusOr<std::string> tag = (*computation)->ComputeMac(); |
| ASSERT_THAT(tag, IsOk()); |
| |
| util::StatusOr<std::unique_ptr<ChunkedMacVerification>> verification = |
| (*chunked_mac)->CreateVerification(*tag); |
| ASSERT_THAT(verification, IsOk()); |
| ASSERT_THAT((*verification)->Update("abc"), IsOk()); |
| ASSERT_THAT((*verification)->Update("xyz"), IsOk()); |
| EXPECT_THAT((*verification)->VerifyMac(), IsOk()); |
| } |
| |
| TEST(HmacKeyManagerTest, MixPrimitives) { |
| HmacKeyFormat key_format; |
| key_format.mutable_params()->set_tag_size(16); |
| key_format.mutable_params()->set_hash(HashType::SHA256); |
| key_format.set_key_size(16); |
| HmacKey key = HmacKeyManager().CreateKey(key_format).value(); |
| |
| util::StatusOr<std::unique_ptr<Mac>> mac = |
| HmacKeyManager().GetPrimitive<Mac>(key); |
| ASSERT_THAT(mac, IsOk()); |
| |
| util::StatusOr<std::unique_ptr<ChunkedMac>> chunked_mac = |
| HmacKeyManager().GetPrimitive<ChunkedMac>(key); |
| ASSERT_THAT(chunked_mac, IsOk()); |
| |
| // Compute tag with Mac. |
| util::StatusOr<std::string> tag = (*mac)->ComputeMac("abcxyz"); |
| ASSERT_THAT(tag, IsOk()); |
| |
| // Compute chunked tag with ChunkedMac. |
| util::StatusOr<std::unique_ptr<ChunkedMacComputation>> computation = |
| (*chunked_mac)->CreateComputation(); |
| ASSERT_THAT(computation, IsOk()); |
| ASSERT_THAT((*computation)->Update("abc"), IsOk()); |
| ASSERT_THAT((*computation)->Update("xyz"), IsOk()); |
| util::StatusOr<std::string> chunked_tag = (*computation)->ComputeMac(); |
| ASSERT_THAT(chunked_tag, IsOk()); |
| ASSERT_THAT(*chunked_tag, Eq(*tag)); // Both primitives generated same tag. |
| |
| // Verify chunked tag with Mac. |
| ASSERT_THAT((*mac)->VerifyMac(*chunked_tag, "abcxyz"), IsOk()); |
| |
| // Verify tag with ChunkedMac. |
| util::StatusOr<std::unique_ptr<ChunkedMacVerification>> verification = |
| (*chunked_mac)->CreateVerification(*tag); |
| ASSERT_THAT(verification, IsOk()); |
| ASSERT_THAT((*verification)->Update("abc"), IsOk()); |
| ASSERT_THAT((*verification)->Update("xyz"), IsOk()); |
| EXPECT_THAT((*verification)->VerifyMac(), IsOk()); |
| } |
| |
| } // namespace |
| } // namespace tink |
| } // namespace crypto |
