| // Copyright 2017 The Fuchsia Authors |
| // |
| // 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 "util/encrypted_message_util.h" |
| |
| #include <string> |
| |
| #include "./encrypted_message.pb.h" |
| #include "./observation.pb.h" |
| #include "third_party/googletest/googletest/include/gtest/gtest.h" |
| #include "util/crypto_util/cipher.h" |
| |
| namespace cobalt { |
| namespace util { |
| |
| using crypto::HybridCipher; |
| |
| Observation MakeDummyObservation(std::string part_name) { |
| Observation observation; |
| (*observation.mutable_parts())[part_name] = ObservationPart(); |
| return observation; |
| } |
| |
| // Tests the use of the no-encryption option. |
| TEST(EncryptedMessageUtilTest, NoEncryption) { |
| // Make a dummy observation. |
| auto observation = MakeDummyObservation("hello"); |
| // Make an EncryptedMessageMaker that uses the NONE encryption scheme. |
| EncryptedMessageMaker maker("dummy_key", EncryptedMessage::NONE); |
| // Encrypt the dummy observation. |
| EncryptedMessage encrypted_message; |
| EXPECT_TRUE(maker.Encrypt(observation, &encrypted_message)); |
| |
| // Make a MessageDecrypter. |
| MessageDecrypter decrypter("dummy_key"); |
| // Decrypt and check. |
| observation.Clear(); |
| EXPECT_TRUE(decrypter.DecryptMessage(encrypted_message, &observation)); |
| EXPECT_EQ(1, observation.parts().count("hello")); |
| } |
| |
| // Tests the use of bad encryption keys |
| TEST(EncryptedMessageUtilTest, BadKeys) { |
| // Make a dummy observation. |
| auto observation = MakeDummyObservation("hello"); |
| |
| // Make an EncryptedMessageMaker that uses a bad public key. |
| EncryptedMessageMaker maker("dummy_key", EncryptedMessage::HYBRID_ECDH_V1); |
| // Try to encrypt the dummy observation. |
| EncryptedMessage encrypted_message; |
| // Expect it to fail, but not crash. |
| EXPECT_FALSE(maker.Encrypt(observation, &encrypted_message)); |
| } |
| |
| // Tests the use of the hybrid cipher option. |
| TEST(EncryptedMessageUtilTest, HybridEncryption) { |
| std::string public_key; |
| std::string private_key; |
| EXPECT_TRUE(HybridCipher::GenerateKeyPairPEM(&public_key, &private_key)); |
| |
| // Make a dummy observation. |
| auto observation = MakeDummyObservation("hello"); |
| |
| // Make an EncryptedMessageMaker that uses our real encryption scheme. |
| EncryptedMessageMaker maker(public_key, EncryptedMessage::HYBRID_ECDH_V1); |
| // Encrypt the dummy observation. |
| EncryptedMessage encrypted_message; |
| ASSERT_TRUE(maker.Encrypt(observation, &encrypted_message)); |
| EXPECT_EQ(32, encrypted_message.public_key_fingerprint().size()); |
| |
| // Make a MessageDecrypter. |
| MessageDecrypter decrypter(private_key); |
| // Decrypt and check. |
| observation.Clear(); |
| ASSERT_TRUE(decrypter.DecryptMessage(encrypted_message, &observation)); |
| EXPECT_EQ(1, observation.parts().count("hello")); |
| |
| // Make a MessageDecrypter that uses a bad private key. |
| MessageDecrypter bad_decrypter("dummy_key"); |
| // Try to decrypt. |
| // Expect it to fail, but not crash. |
| EXPECT_FALSE(bad_decrypter.DecryptMessage(encrypted_message, &observation)); |
| } |
| |
| // Tests that using encryption incorrectly fails but doesn't cause any crashes. |
| TEST(EncryptedMessageUtilTest, Crazy) { |
| std::string public_key; |
| std::string private_key; |
| EXPECT_TRUE(HybridCipher::GenerateKeyPairPEM(&public_key, &private_key)); |
| |
| // Make a dummy observation. |
| auto observation = MakeDummyObservation("hello"); |
| |
| // Make an EncryptedMessageMaker that incorrectly uses the private key |
| // instead of the public key |
| EncryptedMessageMaker bad_maker(private_key, |
| EncryptedMessage::HYBRID_ECDH_V1); |
| // Try to encrypt the dummy observation. |
| EncryptedMessage encrypted_message; |
| // Expect it to fail, but not crash. |
| EXPECT_FALSE(bad_maker.Encrypt(observation, &encrypted_message)); |
| |
| // Now make a good EncryptedMessageMaker |
| EncryptedMessageMaker real_maker(public_key, |
| EncryptedMessage::HYBRID_ECDH_V1); |
| // Encrypt the dummy observation. |
| EXPECT_TRUE(real_maker.Encrypt(observation, &encrypted_message)); |
| |
| // Make a MessageDecrypter that uses the correct private key. |
| MessageDecrypter real_decrypter(private_key); |
| // Decrypt and check. |
| observation.Clear(); |
| EXPECT_TRUE(real_decrypter.DecryptMessage(encrypted_message, &observation)); |
| EXPECT_EQ(1, observation.parts().count("hello")); |
| |
| // Make a MessageDecrypter that incorrectly uses the public key |
| MessageDecrypter bad_decrypter(public_key); |
| // Try to decrypt. |
| // Expect it to fail, but not crash. |
| EXPECT_FALSE(bad_decrypter.DecryptMessage(encrypted_message, &observation)); |
| |
| // Try to decrypt corrupted ciphertext. |
| // Expect it to fail, but not crash. |
| encrypted_message.mutable_ciphertext()[0] = |
| encrypted_message.ciphertext()[0] + 1; |
| EXPECT_FALSE(real_decrypter.DecryptMessage(encrypted_message, &observation)); |
| } |
| |
| } // namespace util |
| } // namespace cobalt |