1  /*
2   * Copyright (C) 2020 The Android Open Source Project
3   *
4   * Licensed under the Apache License, Version 2.0 (the "License");
5   * you may not use this file except in compliance with the License.
6   * You may obtain a copy of the License at
7   *
8   *      http://www.apache.org/licenses/LICENSE-2.0
9   *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  
17  #include <gtest/gtest.h>
18  
19  #include <memory>
20  
21  #include <adb/pairing/aes_128_gcm.h>
22  #include <openssl/rand.h>
23  
24  namespace adb {
25  namespace pairing {
26  
TEST(Aes128GcmTest,init_null_material)27  TEST(Aes128GcmTest, init_null_material) {
28      std::unique_ptr<Aes128Gcm> cipher;
29      ASSERT_DEATH({ cipher.reset(new Aes128Gcm(nullptr, 42)); }, "");
30  }
31  
TEST(Aes128GcmTest,init_empty_material)32  TEST(Aes128GcmTest, init_empty_material) {
33      uint8_t material[64];
34      std::unique_ptr<Aes128Gcm> cipher;
35      ASSERT_DEATH({ cipher.reset(new Aes128Gcm(material, 0)); }, "");
36  }
37  
TEST(Aes128GcmTest,encrypt_decrypt)38  TEST(Aes128GcmTest, encrypt_decrypt) {
39      const uint8_t msg[] = "alice and bob, sitting in a binary tree";
40      uint8_t material[256];
41      uint8_t encrypted[1024];
42      uint8_t out_buf[1024] = {};
43  
44      RAND_bytes(material, sizeof(material));
45      Aes128Gcm alice(material, sizeof(material));
46      Aes128Gcm bob(material, sizeof(material));
47      ;
48  
49      ASSERT_GE(alice.EncryptedSize(sizeof(msg)), sizeof(msg));
50      auto encrypted_size = alice.Encrypt(msg, sizeof(msg), encrypted, sizeof(encrypted));
51      ASSERT_TRUE(encrypted_size.has_value());
52      ASSERT_GT(*encrypted_size, 0);
53      size_t out_size = sizeof(out_buf);
54      ASSERT_GE(bob.DecryptedSize(*encrypted_size), sizeof(msg));
55      auto decrypted_size = bob.Decrypt(encrypted, *encrypted_size, out_buf, out_size);
56      ASSERT_TRUE(decrypted_size.has_value());
57      ASSERT_EQ(sizeof(msg), *decrypted_size);
58      ASSERT_STREQ(reinterpret_cast<const char*>(msg), reinterpret_cast<const char*>(out_buf));
59  }
60  
61  }  // namespace pairing
62  }  // namespace adb
63